625355431 has 4 divisors (see below), whose sum is σ = 625406272. Its totient is φ = 625304592.

The previous prime is 625355399. The next prime is 625355453. The reversal of 625355431 is 134553526.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 134553526 = 2 ⋅67276763.

It is a cyclic number.

It is not a de Polignac number, because 625355431 - 2⁵ = 625355399 is a prime.

It is a super-2 number, since 2×625355431² = 782138830162391522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625355461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5866 + ... + 35848.

It is an arithmetic number, because the mean of its divisors is an integer number (156351568).

Almost surely, 2^625355431 is an apocalyptic number.

625355431 is a deficient number, since it is larger than the sum of its proper divisors (50841).

625355431 is a wasteful number, since it uses less digits than its factorization.

625355431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50840.

The product of its digits is 54000, while the sum is 34.

The square root of 625355431 is about 25007.1076096377. The cubic root of 625355431 is about 855.1500168809.

The spelling of 625355431 in words is "six hundred twenty-five million, three hundred fifty-five thousand, four hundred thirty-one".