625391255 has 16 divisors (see below), whose sum is σ = 774334080. Its totient is φ = 484643328.

The previous prime is 625391243. The next prime is 625391281. The reversal of 625391255 is 552193526.

It is a cyclic number.

It is not a de Polignac number, because 625391255 - 2⁶ = 625391191 is a prime.

It is a super-2 number, since 2×625391255² = 782228443660950050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5999 + ... + 35871.

It is an arithmetic number, because the mean of its divisors is an integer number (48395880).

Almost surely, 2^625391255 is an apocalyptic number.

625391255 is a deficient number, since it is larger than the sum of its proper divisors (148942825).

625391255 is a wasteful number, since it uses less digits than its factorization.

625391255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30010.

The product of its digits is 81000, while the sum is 38.

The square root of 625391255 is about 25007.8238757394. The cubic root of 625391255 is about 855.1663458930.

The spelling of 625391255 in words is "six hundred twenty-five million, three hundred ninety-one thousand, two hundred fifty-five".