31090425 has 12 divisors (see below), whose sum is σ = 51402960. Its totient is φ = 16581520.

The previous prime is 31090421. The next prime is 31090531. The reversal of 31090425 is 52409013.

It is not a de Polignac number, because 31090425 - 2² = 31090421 is a prime.

It is a super-2 number, since 2×31090425² = 1933229053361250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31090395 and 31090404.

It is not an unprimeable number, because it can be changed into a prime (31090421) 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, 207195 + ... + 207344.

It is an arithmetic number, because the mean of its divisors is an integer number (4283580).

Almost surely, 2^31090425 is an apocalyptic number.

It is an amenable number.

31090425 is a deficient number, since it is larger than the sum of its proper divisors (20312535).

31090425 is a wasteful number, since it uses less digits than its factorization.

31090425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414552 (or 414547 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 31090425 is about 5575.8788544946. The cubic root of 31090425 is about 314.4432088928.

Adding to 31090425 its reverse (52409013), we get a palindrome (83499438).

The spelling of 31090425 in words is "thirty-one million, ninety thousand, four hundred twenty-five".