31860431152 has 20 divisors (see below), whose sum is σ = 67341366216. Its totient is φ = 14482014080.

The previous prime is 31860431123. The next prime is 31860431159. The reversal of 31860431152 is 25113406813.

It is a super-3 number, since 3×31860431152³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (31860431159) 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 3 ways as a sum of consecutive naturals, for example, 90512413 + ... + 90512764.

Almost surely, 2^31860431152 is an apocalyptic number.

It is an amenable number.

31860431152 is an abundant number, since it is smaller than the sum of its proper divisors (35480935064).

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

31860431152 is a wasteful number, since it uses less digits than its factorization.

31860431152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181025196 (or 181025190 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

Adding to 31860431152 its reverse (25113406813), we get a palindrome (56973837965).

The spelling of 31860431152 in words is "thirty-one billion, eight hundred sixty million, four hundred thirty-one thousand, one hundred fifty-two".