625321231 has 4 divisors (see below), whose sum is σ = 625390200. Its totient is φ = 625252264.

The previous prime is 625321223. The next prime is 625321237. The reversal of 625321231 is 132123526.

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.

It is a cyclic number.

It is not a de Polignac number, because 625321231 - 2³ = 625321223 is a prime.

It is a super-2 number, since 2×625321231² = 782053283878710722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 625321196 and 625321205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625321237) 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, 18376 + ... + 39853.

It is an arithmetic number, because the mean of its divisors is an integer number (156347550).

Almost surely, 2^625321231 is an apocalyptic number.

625321231 is a deficient number, since it is larger than the sum of its proper divisors (68969).

625321231 is a wasteful number, since it uses less digits than its factorization.

625321231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68968.

The product of its digits is 2160, while the sum is 25.

The square root of 625321231 is about 25006.4237946972. The cubic root of 625321231 is about 855.1344275258.

Adding to 625321231 its reverse (132123526), we get a palindrome (757444757).

The spelling of 625321231 in words is "six hundred twenty-five million, three hundred twenty-one thousand, two hundred thirty-one".