255381761 has 4 divisors (see below), whose sum is σ = 255484500. Its totient is φ = 255279024.

The previous prime is 255381727. The next prime is 255381779. The reversal of 255381761 is 167183552.

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 147865600 + 107516161 = 12160^2 + 10369^2 .

It is a cyclic number.

It is not a de Polignac number, because 255381761 - 2¹⁰ = 255380737 is a prime.

It is a super-2 number, since 2×255381761² = 130439687702922242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255381461) 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, 47546 + ... + 52643.

It is an arithmetic number, because the mean of its divisors is an integer number (63871125).

Almost surely, 2^255381761 is an apocalyptic number.

It is an amenable number.

255381761 is a deficient number, since it is larger than the sum of its proper divisors (102739).

255381761 is a wasteful number, since it uses less digits than its factorization.

255381761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102738.

The product of its digits is 50400, while the sum is 38.

The square root of 255381761 is about 15980.6683527317. The cubic root of 255381761 is about 634.4488664535.

The spelling of 255381761 in words is "two hundred fifty-five million, three hundred eighty-one thousand, seven hundred sixty-one".