625312431 has 12 divisors (see below), whose sum is σ = 942500208. Its totient is φ = 398749824.

The previous prime is 625312427. The next prime is 625312447. The reversal of 625312431 is 134213526.

625312431 is a `hidden beast` number, since 625 + 3 + 1 + 2 + 4 + 31 = 666.

It is not a de Polignac number, because 625312431 - 2² = 625312427 is a prime.

It is a super-2 number, since 2×625312431² = 782031272726259522, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 625312395 and 625312404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625312451) 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, 1510210 + ... + 1510623.

It is an arithmetic number, because the mean of its divisors is an integer number (78541684).

Almost surely, 2^625312431 is an apocalyptic number.

625312431 is a deficient number, since it is larger than the sum of its proper divisors (317187777).

625312431 is a wasteful number, since it uses less digits than its factorization.

625312431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3020862 (or 3020859 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 625312431 is about 25006.2478392901. The cubic root of 625312431 is about 855.1304161378.

Adding to 625312431 its reverse (134213526), we get a palindrome (759525957).

The spelling of 625312431 in words is "six hundred twenty-five million, three hundred twelve thousand, four hundred thirty-one".