255779381 has 8 divisors (see below), whose sum is σ = 300496224. Its totient is φ = 214639920.

The previous prime is 255779341. The next prime is 255779383. The reversal of 255779381 is 183977552.

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

It is not a de Polignac number, because 255779381 - 2¹⁰ = 255778357 is a prime.

It is a super-2 number, since 2×255779381² = 130846183489486322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255779383) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 894191 + ... + 894476.

It is an arithmetic number, because the mean of its divisors is an integer number (37562028).

Almost surely, 2^255779381 is an apocalyptic number.

It is an amenable number.

255779381 is a deficient number, since it is larger than the sum of its proper divisors (44716843).

255779381 is a wasteful number, since it uses less digits than its factorization.

255779381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1788691.

The product of its digits is 529200, while the sum is 47.

The square root of 255779381 is about 15993.1041702354. The cubic root of 255779381 is about 634.7779668894. Note that the first 3 decimals are identical.

The spelling of 255779381 in words is "two hundred fifty-five million, seven hundred seventy-nine thousand, three hundred eighty-one".