255903945 has 64 divisors (see below), whose sum is σ = 460615680. Its totient is φ = 120268800.

The previous prime is 255903937. The next prime is 255903959. The reversal of 255903945 is 549309552.

It is not a de Polignac number, because 255903945 - 2³ = 255903937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 255903897 and 255903906.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 944160 + ... + 944430.

It is an arithmetic number, because the mean of its divisors is an integer number (7197120).

Almost surely, 2^255903945 is an apocalyptic number.

It is an amenable number.

255903945 is a deficient number, since it is larger than the sum of its proper divisors (204711735).

255903945 is a wasteful number, since it uses less digits than its factorization.

255903945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446.

The product of its (nonzero) digits is 243000, while the sum is 42.

The square root of 255903945 is about 15996.9979996248. The cubic root of 255903945 is about 634.8809953276.

The spelling of 255903945 in words is "two hundred fifty-five million, nine hundred three thousand, nine hundred forty-five".