255377581 has 2 divisors, whose sum is σ = 255377582. Its totient is φ = 255377580.

The previous prime is 255377543. The next prime is 255377599. The reversal of 255377581 is 185773552.

255377581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 245423556 + 9954025 = 15666^2 + 3155^2 .

It is a cyclic number.

It is not a de Polignac number, because 255377581 - 2²⁵ = 221823149 is a prime.

It is a super-2 number, since 2×255377581² = 130435417754823122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255377501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127688790 + 127688791.

It is an arithmetic number, because the mean of its divisors is an integer number (127688791).

Almost surely, 2^255377581 is an apocalyptic number.

It is an amenable number.

255377581 is a deficient number, since it is larger than the sum of its proper divisors (1).

255377581 is an equidigital number, since it uses as much as digits as its factorization.

255377581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 294000, while the sum is 43.

The square root of 255377581 is about 15980.5375691808. The cubic root of 255377581 is about 634.4454049550.

The spelling of 255377581 in words is "two hundred fifty-five million, three hundred seventy-seven thousand, five hundred eighty-one".