255551979 has 8 divisors (see below), whose sum is σ = 342264832. Its totient is φ = 169603560.

The previous prime is 255551977. The next prime is 255551981. The reversal of 255551979 is 979155552.

It is an interprime number because it is at equal distance from previous prime (255551977) and next prime (255551981).

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

It is not a de Polignac number, because 255551979 - 2¹ = 255551977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255551977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190327 + ... + 191664.

It is an arithmetic number, because the mean of its divisors is an integer number (42783104).

Almost surely, 2^255551979 is an apocalyptic number.

255551979 is a deficient number, since it is larger than the sum of its proper divisors (86712853).

255551979 is a wasteful number, since it uses less digits than its factorization.

255551979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382217.

The product of its digits is 708750, while the sum is 48.

The square root of 255551979 is about 15985.9932128098. The cubic root of 255551979 is about 634.5897935528.

The spelling of 255551979 in words is "two hundred fifty-five million, five hundred fifty-one thousand, nine hundred seventy-nine".