255747261 has 32 divisors (see below), whose sum is σ = 426083328. Its totient is φ = 132560640.

The previous prime is 255747229. The next prime is 255747263. The reversal of 255747261 is 162747552.

It is not a de Polignac number, because 255747261 - 2⁵ = 255747229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255747263) 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, 136050 + ... + 137916.

It is an arithmetic number, because the mean of its divisors is an integer number (13315104).

Almost surely, 2^255747261 is an apocalyptic number.

255747261 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

255747261 is a deficient number, since it is larger than the sum of its proper divisors (170336067).

255747261 is a wasteful number, since it uses less digits than its factorization.

255747261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2481.

The product of its digits is 117600, while the sum is 39.

The square root of 255747261 is about 15992.0999559157. The cubic root of 255747261 is about 634.7513946122.

The spelling of 255747261 in words is "two hundred fifty-five million, seven hundred forty-seven thousand, two hundred sixty-one".