255371881 has 4 divisors (see below), whose sum is σ = 255647700. Its totient is φ = 255096064.

The previous prime is 255371867. The next prime is 255371899. The reversal of 255371881 is 188173552.

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 112784400 + 142587481 = 10620^2 + 11941^2 .

It is a cyclic number.

It is not a de Polignac number, because 255371881 - 2¹¹ = 255369833 is a prime.

It is a super-2 number, since 2×255371881² = 130429595210956322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255378881) 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, 136516 + ... + 138373.

It is an arithmetic number, because the mean of its divisors is an integer number (63911925).

Almost surely, 2^255371881 is an apocalyptic number.

It is an amenable number.

255371881 is a deficient number, since it is larger than the sum of its proper divisors (275819).

255371881 is an equidigital number, since it uses as much as digits as its factorization.

255371881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275818.

The product of its digits is 67200, while the sum is 40.

The square root of 255371881 is about 15980.3592262502. The cubic root of 255371881 is about 634.4406846689.

The spelling of 255371881 in words is "two hundred fifty-five million, three hundred seventy-one thousand, eight hundred eighty-one".