255771491 has 8 divisors (see below), whose sum is σ = 265288944. Its totient is φ = 246391200.

The previous prime is 255771479. The next prime is 255771499. The reversal of 255771491 is 194177552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 255771491 - 2²² = 251577187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255771499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30485 + ... + 37958.

It is an arithmetic number, because the mean of its divisors is an integer number (33161118).

Almost surely, 2^255771491 is an apocalyptic number.

255771491 is a deficient number, since it is larger than the sum of its proper divisors (9517453).

255771491 is a wasteful number, since it uses less digits than its factorization.

255771491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68581.

The product of its digits is 88200, while the sum is 41.

The square root of 255771491 is about 15992.8574995215. The cubic root of 255771491 is about 634.7714398456.

The spelling of 255771491 in words is "two hundred fifty-five million, seven hundred seventy-one thousand, four hundred ninety-one".