255161761 has 4 divisors (see below), whose sum is σ = 255730500. Its totient is φ = 254593024.

The previous prime is 255161743. The next prime is 255161771. The reversal of 255161761 is 167161552.

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

It can be written as a sum of positive squares in 2 ways, for example, as 140564736 + 114597025 = 11856^2 + 10705^2 .

It is a cyclic number.

It is not a de Polignac number, because 255161761 - 2¹¹ = 255159713 is a prime.

It is a super-2 number, since 2×255161761² = 130215048553242242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255161741) 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, 283696 + ... + 284593.

It is an arithmetic number, because the mean of its divisors is an integer number (63932625).

Almost surely, 2^255161761 is an apocalyptic number.

It is an amenable number.

255161761 is a deficient number, since it is larger than the sum of its proper divisors (568739).

255161761 is an equidigital number, since it uses as much as digits as its factorization.

255161761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568738.

The product of its digits is 12600, while the sum is 34.

The square root of 255161761 is about 15973.7835530597. The cubic root of 255161761 is about 634.2666309778.

The spelling of 255161761 in words is "two hundred fifty-five million, one hundred sixty-one thousand, seven hundred sixty-one".