31081425 has 24 divisors (see below), whose sum is σ = 52017504. Its totient is φ = 16373760.

The previous prime is 31081363. The next prime is 31081433. The reversal of 31081425 is 52418013.

It is not a de Polignac number, because 31081425 - 2⁶ = 31081361 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31081395 and 31081404.

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 23 ways as a sum of consecutive naturals, for example, 3729 + ... + 8721.

It is an arithmetic number, because the mean of its divisors is an integer number (2167396).

Almost surely, 2^31081425 is an apocalyptic number.

It is an amenable number.

31081425 is a deficient number, since it is larger than the sum of its proper divisors (20936079).

31081425 is a wasteful number, since it uses less digits than its factorization.

31081425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5089 (or 5084 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 31081425 is about 5575.0717484172. The cubic root of 31081425 is about 314.4128644808.

Adding to 31081425 its reverse (52418013), we get a palindrome (83499438).

The spelling of 31081425 in words is "thirty-one million, eighty-one thousand, four hundred twenty-five".