31425012 has 36 divisors (see below), whose sum is σ = 83618080. Its totient is φ = 9923472.

The previous prime is 31425001. The next prime is 31425029. The reversal of 31425012 is 21052413.

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 22288 + ... + 23655.

Almost surely, 2^31425012 is an apocalyptic number.

It is an amenable number.

31425012 is an abundant number, since it is smaller than the sum of its proper divisors (52193068).

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

31425012 is a wasteful number, since it uses less digits than its factorization.

31425012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45972 (or 45967 counting only the distinct ones).

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

The square root of 31425012 is about 5605.8016375894. The cubic root of 31425012 is about 315.5671716686.

Adding to 31425012 its reverse (21052413), we get a palindrome (52477425).

The spelling of 31425012 in words is "thirty-one million, four hundred twenty-five thousand, twelve".