255560621 has 8 divisors (see below), whose sum is σ = 277689600. Its totient is φ = 234299520.

The previous prime is 255560611. The next prime is 255560623. The reversal of 255560621 is 126065552.

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

It is a cyclic number.

It is not a de Polignac number, because 255560621 - 2¹⁰ = 255559597 is a prime.

It is a super-2 number, since 2×255560621² = 130622462011811282, 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 (255560623) 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, 216356 + ... + 217533.

It is an arithmetic number, because the mean of its divisors is an integer number (34711200).

Almost surely, 2^255560621 is an apocalyptic number.

It is an amenable number.

255560621 is a deficient number, since it is larger than the sum of its proper divisors (22128979).

255560621 is a wasteful number, since it uses less digits than its factorization.

255560621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433939.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 255560621 is about 15986.2635096510. The cubic root of 255560621 is about 634.5969467788.

The spelling of 255560621 in words is "two hundred fifty-five million, five hundred sixty thousand, six hundred twenty-one".