31131223332 has 48 divisors (see below), whose sum is σ = 79275938112. Its totient is φ = 9429796480.

The previous prime is 31131223313. The next prime is 31131223397. The reversal of 31131223332 is 23332213113.

It is a super-2 number, since 2×31131223332² (a number of 22 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 279358 + ... + 374570.

It is an arithmetic number, because the mean of its divisors is an integer number (1651582044).

Almost surely, 2^31131223332 is an apocalyptic number.

It is an amenable number.

31131223332 is an abundant number, since it is smaller than the sum of its proper divisors (48144714780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31131223332 is a wasteful number, since it uses less digits than its factorization.

31131223332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97708 (or 97706 counting only the distinct ones).

The product of its digits is 1944, while the sum is 24.

Adding to 31131223332 its reverse (23332213113), we get a palindrome (54463436445).

The spelling of 31131223332 in words is "thirty-one billion, one hundred thirty-one million, two hundred twenty-three thousand, three hundred thirty-two".