255618261 has 12 divisors (see below), whose sum is σ = 382901792. Its totient is φ = 170412012.

The previous prime is 255618241. The next prime is 255618263. The reversal of 255618261 is 162816552.

It is not a de Polignac number, because 255618261 - 2⁶ = 255618197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255618263) 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 11 ways as a sum of consecutive naturals, for example, 525721 + ... + 526206.

Almost surely, 2^255618261 is an apocalyptic number.

It is an amenable number.

255618261 is a deficient number, since it is larger than the sum of its proper divisors (127283531).

255618261 is an equidigital number, since it uses as much as digits as its factorization.

255618261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051942 (or 1051930 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 255618261 is about 15988.0662057674. The cubic root of 255618261 is about 634.6446529006.

The spelling of 255618261 in words is "two hundred fifty-five million, six hundred eighteen thousand, two hundred sixty-one".