255405057 has 4 divisors (see below), whose sum is σ = 340540080. Its totient is φ = 170270036.

The previous prime is 255405037. The next prime is 255405077. The reversal of 255405057 is 750504552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (255405037) and next prime (255405077).

It is a cyclic number.

It is not a de Polignac number, because 255405057 - 2²³ = 247016449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (255405037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42567507 + ... + 42567512.

It is an arithmetic number, because the mean of its divisors is an integer number (85135020).

Almost surely, 2^255405057 is an apocalyptic number.

It is an amenable number.

255405057 is a deficient number, since it is larger than the sum of its proper divisors (85135023).

255405057 is an equidigital number, since it uses as much as digits as its factorization.

255405057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85135022.

The product of its (nonzero) digits is 35000, while the sum is 33.

The square root of 255405057 is about 15981.3972167642. The cubic root of 255405057 is about 634.4681574049.

The spelling of 255405057 in words is "two hundred fifty-five million, four hundred five thousand, fifty-seven".