31287653952 has 112 divisors (see below), whose sum is σ = 83798493312. Its totient is φ = 10301644800.

The previous prime is 31287653857. The next prime is 31287653959. The reversal of 31287653952 is 25935678213.

It is a junction number, because it is equal to n+sod(n) for n = 31287653895 and 31287653904.

It is not an unprimeable number, because it can be changed into a prime (31287653959) 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, 9442248 + ... + 9445560.

Almost surely, 2^31287653952 is an apocalyptic number.

31287653952 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31287653952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41899246656).

31287653952 is an abundant number, since it is smaller than the sum of its proper divisors (52510839360).

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

31287653952 is a wasteful number, since it uses less digits than its factorization.

31287653952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3916 (or 3906 counting only the distinct ones).

The product of its digits is 2721600, while the sum is 51.

The spelling of 31287653952 in words is "thirty-one billion, two hundred eighty-seven million, six hundred fifty-three thousand, nine hundred fifty-two".