255442551 has 16 divisors (see below), whose sum is σ = 419188224. Its totient is φ = 134738784.

The previous prime is 255442547. The next prime is 255442553. The reversal of 255442551 is 155244552.

It is not a de Polignac number, because 255442551 - 2² = 255442547 is a prime.

It is a super-2 number, since 2×255442551² = 130501793722775202, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255442553) 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, 467571 + ... + 468116.

It is an arithmetic number, because the mean of its divisors is an integer number (26199264).

Almost surely, 2^255442551 is an apocalyptic number.

255442551 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

255442551 is a deficient number, since it is larger than the sum of its proper divisors (163745673).

255442551 is a wasteful number, since it uses less digits than its factorization.

255442551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935710.

The product of its digits is 40000, while the sum is 33.

The square root of 255442551 is about 15982.5702250921. The cubic root of 255442551 is about 634.4992029727.

The spelling of 255442551 in words is "two hundred fifty-five million, four hundred forty-two thousand, five hundred fifty-one".