625562731 has 2 divisors, whose sum is σ = 625562732. Its totient is φ = 625562730.

The previous prime is 625562681. The next prime is 625562759. The reversal of 625562731 is 137265526.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 625562731 - 2¹³ = 625554539 is a prime.

It is a super-2 number, since 2×625562731² = 782657460832356722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (625562771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312781365 + 312781366.

It is an arithmetic number, because the mean of its divisors is an integer number (312781366).

Almost surely, 2^625562731 is an apocalyptic number.

625562731 is a deficient number, since it is larger than the sum of its proper divisors (1).

625562731 is an equidigital number, since it uses as much as digits as its factorization.

625562731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 37.

The square root of 625562731 is about 25011.2520878104. The cubic root of 625562731 is about 855.2444980912.

It can be divided in two parts, 6255 and 62731, that added together give a palindrome (68986).

The spelling of 625562731 in words is "six hundred twenty-five million, five hundred sixty-two thousand, seven hundred thirty-one".