255563431 has 16 divisors (see below), whose sum is σ = 274827168. Its totient is φ = 236800000.

The previous prime is 255563387. The next prime is 255563443. The reversal of 255563431 is 134365552.

It is a cyclic number.

It is not a de Polignac number, because 255563431 - 2⁷ = 255563303 is a prime.

It is a super-2 number, since 2×255563431² = 130625334528983522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255566431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 430671 + ... + 431263.

It is an arithmetic number, because the mean of its divisors is an integer number (17176698).

Almost surely, 2^255563431 is an apocalyptic number.

255563431 is a deficient number, since it is larger than the sum of its proper divisors (19263737).

255563431 is a wasteful number, since it uses less digits than its factorization.

255563431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962.

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

The square root of 255563431 is about 15986.3513973639. The cubic root of 255563431 is about 634.5992726599.

The spelling of 255563431 in words is "two hundred fifty-five million, five hundred sixty-three thousand, four hundred thirty-one".