255561451 has 4 divisors (see below), whose sum is σ = 256383504. Its totient is φ = 254739400.

The previous prime is 255561443. The next prime is 255561463. The reversal of 255561451 is 154165552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 255561451 - 2³ = 255561443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255561491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 410560 + ... + 411181.

It is an arithmetic number, because the mean of its divisors is an integer number (64095876).

Almost surely, 2^255561451 is an apocalyptic number.

255561451 is a deficient number, since it is larger than the sum of its proper divisors (822053).

255561451 is an equidigital number, since it uses as much as digits as its factorization.

255561451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822052.

The product of its digits is 30000, while the sum is 34.

The square root of 255561451 is about 15986.2894694172. The cubic root of 255561451 is about 634.5976337846.

The spelling of 255561451 in words is "two hundred fifty-five million, five hundred sixty-one thousand, four hundred fifty-one".