255561271 has 4 divisors (see below), whose sum is σ = 292070032. Its totient is φ = 219052512.

The previous prime is 255561263. The next prime is 255561277. The reversal of 255561271 is 172165552.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 255561271 - 2³ = 255561263 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 (255561277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18254370 + ... + 18254383.

It is an arithmetic number, because the mean of its divisors is an integer number (73017508).

Almost surely, 2^255561271 is an apocalyptic number.

255561271 is a deficient number, since it is larger than the sum of its proper divisors (36508761).

255561271 is an equidigital number, since it uses as much as digits as its factorization.

255561271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36508760.

The product of its digits is 21000, while the sum is 34.

The square root of 255561271 is about 15986.2838395920. The cubic root of 255561271 is about 634.5974847955.

The spelling of 255561271 in words is "two hundred fifty-five million, five hundred sixty-one thousand, two hundred seventy-one".