255712621 has 8 divisors (see below), whose sum is σ = 270351200. Its totient is φ = 241192080.

The previous prime is 255712591. The next prime is 255712627. The reversal of 255712621 is 126217552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 255712621 - 2¹⁷ = 255581549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255712627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25035 + ... + 33736.

It is an arithmetic number, because the mean of its divisors is an integer number (33793900).

Almost surely, 2^255712621 is an apocalyptic number.

It is an amenable number.

255712621 is a deficient number, since it is larger than the sum of its proper divisors (14638579).

255712621 is a wasteful number, since it uses less digits than its factorization.

255712621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59019.

The product of its digits is 8400, while the sum is 31.

The square root of 255712621 is about 15991.0168844886. The cubic root of 255712621 is about 634.7227350924.

The spelling of 255712621 in words is "two hundred fifty-five million, seven hundred twelve thousand, six hundred twenty-one".