31425939 has 12 divisors (see below), whose sum is σ = 46359456. Its totient is φ = 20504592.

The previous prime is 31425929. The next prime is 31425941. The reversal of 31425939 is 93952413.

It is a happy number.

It is not a de Polignac number, because 31425939 - 2⁵ = 31425907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31425929) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36724 + ... + 37569.

It is an arithmetic number, because the mean of its divisors is an integer number (3863288).

Almost surely, 2^31425939 is an apocalyptic number.

31425939 is a deficient number, since it is larger than the sum of its proper divisors (14933517).

31425939 is a wasteful number, since it uses less digits than its factorization.

31425939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74346 (or 74343 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 31425939 is about 5605.8843191775. The cubic root of 31425939 is about 315.5702745886.

The spelling of 31425939 in words is "thirty-one million, four hundred twenty-five thousand, nine hundred thirty-nine".