255031978 has 8 divisors (see below), whose sum is σ = 394888320. Its totient is φ = 123402540.

The previous prime is 255031967. The next prime is 255031991. The reversal of 255031978 is 879130552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 255031978.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2056648 + ... + 2056771.

It is an arithmetic number, because the mean of its divisors is an integer number (49361040).

Almost surely, 2^255031978 is an apocalyptic number.

255031978 is a deficient number, since it is larger than the sum of its proper divisors (139856342).

255031978 is a wasteful number, since it uses less digits than its factorization.

255031978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4113452.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 255031978 is about 15969.7206613015. The cubic root of 255031978 is about 634.1590770009.

The spelling of 255031978 in words is "two hundred fifty-five million, thirty-one thousand, nine hundred seventy-eight".