255087381 has 4 divisors (see below), whose sum is σ = 340116512. Its totient is φ = 170058252.

The previous prime is 255087367. The next prime is 255087409. The reversal of 255087381 is 183780552.

255087381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 255087381 - 2⁷ = 255087253 is a prime.

It is a super-2 number, since 2×255087381² = 130139143890878322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255087311) 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, 42514561 + ... + 42514566.

It is an arithmetic number, because the mean of its divisors is an integer number (85029128).

Almost surely, 2^255087381 is an apocalyptic number.

It is an amenable number.

255087381 is a deficient number, since it is larger than the sum of its proper divisors (85029131).

255087381 is an equidigital number, since it uses as much as digits as its factorization.

255087381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85029130.

The product of its (nonzero) digits is 67200, while the sum is 39.

The square root of 255087381 is about 15971.4551935633. The cubic root of 255087381 is about 634.2049951269.

The spelling of 255087381 in words is "two hundred fifty-five million, eighty-seven thousand, three hundred eighty-one".