2321321331 has 16 divisors (see below), whose sum is σ = 3619514624. Its totient is φ = 1295620704.

The previous prime is 2321321309. The next prime is 2321321363. The reversal of 2321321331 is 1331231232.

2321321331 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2321321331 - 2⁹ = 2321320819 is a prime.

It is a super-2 number, since 2×2321321331² = 10777065443511223122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2321321298 and 2321321307.

It is not an unprimeable number, because it can be changed into a prime (2321321531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1284436 + ... + 1286241.

It is an arithmetic number, because the mean of its divisors is an integer number (226219664).

Almost surely, 2^2321321331 is an apocalyptic number.

2321321331 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2321321331 is a deficient number, since it is larger than the sum of its proper divisors (1298193293).

2321321331 is a wasteful number, since it uses less digits than its factorization.

2321321331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2570730.

The product of its digits is 648, while the sum is 21.

The square root of 2321321331 is about 48180.0926835970. The cubic root of 2321321331 is about 1324.0724646054.

Adding to 2321321331 its reverse (1331231232), we get a palindrome (3652552563).

Subtracting from 2321321331 its reverse (1331231232), we obtain a palindrome (990090099).

It can be divided in two parts, 23213 and 21331, that added together give a palindrome (44544).

The spelling of 2321321331 in words is "two billion, three hundred twenty-one million, three hundred twenty-one thousand, three hundred thirty-one".