31311213032 has 32 divisors (see below), whose sum is σ = 64144768320. Its totient is φ = 14210346240.

The previous prime is 31311213019. The next prime is 31311213041. The reversal of 31311213032 is 23031211313.

It is a junction number, because it is equal to n+sod(n) for n = 31311212995 and 31311213013.

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 7 ways as a sum of consecutive naturals, for example, 218033 + ... + 331904.

It is an arithmetic number, because the mean of its divisors is an integer number (2004524010).

Almost surely, 2^31311213032 is an apocalyptic number.

It is an amenable number.

31311213032 is an abundant number, since it is smaller than the sum of its proper divisors (32833555288).

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

31311213032 is a wasteful number, since it uses less digits than its factorization.

31311213032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550601 (or 550597 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31311213032 its reverse (23031211313), we get a palindrome (54342424345).

The spelling of 31311213032 in words is "thirty-one billion, three hundred eleven million, two hundred thirteen thousand, thirty-two".