255877391 has 32 divisors (see below), whose sum is σ = 329894400. Its totient is φ = 192689280.

The previous prime is 255877361. The next prime is 255877393. The reversal of 255877391 is 193778552.

It is a de Polignac number, because none of the positive numbers 2^k-255877391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255877393) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 360545 + ... + 361253.

It is an arithmetic number, because the mean of its divisors is an integer number (10309200).

Almost surely, 2^255877391 is an apocalyptic number.

255877391 is a deficient number, since it is larger than the sum of its proper divisors (74017009).

255877391 is a wasteful number, since it uses less digits than its factorization.

255877391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879.

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

The square root of 255877391 is about 15996.1680098704. The cubic root of 255877391 is about 634.8590349873.

The spelling of 255877391 in words is "two hundred fifty-five million, eight hundred seventy-seven thousand, three hundred ninety-one".