625577131 has 2 divisors, whose sum is σ = 625577132. Its totient is φ = 625577130.

The previous prime is 625577123. The next prime is 625577171. The reversal of 625577131 is 131775526.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 625577131 - 2³ = 625577123 is a prime.

It is a super-2 number, since 2×625577131² = 782693493660382322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (625577171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 312788565 + 312788566.

It is an arithmetic number, because the mean of its divisors is an integer number (312788566).

Almost surely, 2^625577131 is an apocalyptic number.

625577131 is a deficient number, since it is larger than the sum of its proper divisors (1).

625577131 is an equidigital number, since it uses as much as digits as its factorization.

625577131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44100, while the sum is 37.

The square root of 625577131 is about 25011.5399565880. The cubic root of 625577131 is about 855.2510604101.

The spelling of 625577131 in words is "six hundred twenty-five million, five hundred seventy-seven thousand, one hundred thirty-one".