212432331 has 16 divisors (see below), whose sum is σ = 299062400. Its totient is φ = 133757568.

The previous prime is 212432299. The next prime is 212432333. The reversal of 212432331 is 133234212.

It is not a de Polignac number, because 212432331 - 2⁵ = 212432299 is a prime.

It is a super-2 number, since 2×212432331² = 90254990508187122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212432298 and 212432307.

It is not an unprimeable number, because it can be changed into a prime (212432333) 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, 13680 + ... + 24738.

It is an arithmetic number, because the mean of its divisors is an integer number (18691400).

Almost surely, 2^212432331 is an apocalyptic number.

212432331 is a deficient number, since it is larger than the sum of its proper divisors (86630069).

212432331 is a wasteful number, since it uses less digits than its factorization.

212432331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11418.

The product of its digits is 864, while the sum is 21.

The square root of 212432331 is about 14575.0585247539. The cubic root of 212432331 is about 596.6782466395.

Adding to 212432331 its reverse (133234212), we get a palindrome (345666543).

The spelling of 212432331 in words is "two hundred twelve million, four hundred thirty-two thousand, three hundred thirty-one".