31420425 has 12 divisors (see below), whose sum is σ = 51948560. Its totient is φ = 16757520.

The previous prime is 31420409. The next prime is 31420447. The reversal of 31420425 is 52402413.

It is not a de Polignac number, because 31420425 - 2⁴ = 31420409 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 209395 + ... + 209544.

Almost surely, 2^31420425 is an apocalyptic number.

It is an amenable number.

31420425 is a deficient number, since it is larger than the sum of its proper divisors (20528135).

31420425 is a wasteful number, since it uses less digits than its factorization.

31420425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418952 (or 418947 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 31420425 is about 5605.3924929482. The cubic root of 31420425 is about 315.5518168397.

Adding to 31420425 its reverse (52402413), we get a palindrome (83822838).

The spelling of 31420425 in words is "thirty-one million, four hundred twenty thousand, four hundred twenty-five".