31042512 has 30 divisors (see below), whose sum is σ = 86876322. Its totient is φ = 10347456.

The previous prime is 31042489. The next prime is 31042537. The reversal of 31042512 is 21524013.

It can be written as a sum of positive squares in only one way, i.e., 30074256 + 968256 = 5484^2 + 984^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 107643 + ... + 107930.

Almost surely, 2^31042512 is an apocalyptic number.

It is an amenable number.

31042512 is an abundant number, since it is smaller than the sum of its proper divisors (55833810).

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

31042512 is a wasteful number, since it uses less digits than its factorization.

31042512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215587 (or 215578 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 31042512 is about 5571.5807451746. The cubic root of 31042512 is about 314.2815978996.

Adding to 31042512 its reverse (21524013), we get a palindrome (52566525).

The spelling of 31042512 in words is "thirty-one million, forty-two thousand, five hundred twelve".