31213311132 has 24 divisors (see below), whose sum is σ = 75997627776. Its totient is φ = 9952070128.

The previous prime is 31213311121. The next prime is 31213311133. The reversal of 31213311132 is 23111331213.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 31213311099 and 31213311108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31213311133) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 56545578 + ... + 56546129.

It is an arithmetic number, because the mean of its divisors is an integer number (3166567824).

Almost surely, 2^31213311132 is an apocalyptic number.

It is an amenable number.

31213311132 is an abundant number, since it is smaller than the sum of its proper divisors (44784316644).

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

31213311132 is a wasteful number, since it uses less digits than its factorization.

31213311132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113091737 (or 113091735 counting only the distinct ones).

The product of its digits is 324, while the sum is 21.

Adding to 31213311132 its reverse (23111331213), we get a palindrome (54324642345).

The spelling of 31213311132 in words is "thirty-one billion, two hundred thirteen million, three hundred eleven thousand, one hundred thirty-two".