255554905 has 4 divisors (see below), whose sum is σ = 306665892. Its totient is φ = 204443920.

The previous prime is 255554879. The next prime is 255554911. The reversal of 255554905 is 509455552.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 68740681 + 186814224 = 8291^2 + 13668^2 .

It is not a de Polignac number, because 255554905 - 2⁷ = 255554777 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25555486 + ... + 25555495.

It is an arithmetic number, because the mean of its divisors is an integer number (76666473).

Almost surely, 2^255554905 is an apocalyptic number.

It is an amenable number.

255554905 is a deficient number, since it is larger than the sum of its proper divisors (51110987).

255554905 is an equidigital number, since it uses as much as digits as its factorization.

255554905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51110986.

The product of its (nonzero) digits is 225000, while the sum is 40.

The square root of 255554905 is about 15986.0847301645. The cubic root of 255554905 is about 634.5922155032.

The spelling of 255554905 in words is "two hundred fifty-five million, five hundred fifty-four thousand, nine hundred five".