255667571 has 4 divisors (see below), whose sum is σ = 263914944. Its totient is φ = 247420200.

The previous prime is 255667561. The next prime is 255667579. The reversal of 255667571 is 175766552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 255667571 - 2⁶ = 255667507 is a prime.

It is a super-2 number, since 2×255667571² = 130731813722080082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255667579) 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, 4123640 + ... + 4123701.

It is an arithmetic number, because the mean of its divisors is an integer number (65978736).

Almost surely, 2^255667571 is an apocalyptic number.

255667571 is a deficient number, since it is larger than the sum of its proper divisors (8247373).

255667571 is an equidigital number, since it uses as much as digits as its factorization.

255667571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8247372.

The product of its digits is 441000, while the sum is 44.

The square root of 255667571 is about 15989.6082190903. The cubic root of 255667571 is about 634.6854589521.

The spelling of 255667571 in words is "two hundred fifty-five million, six hundred sixty-seven thousand, five hundred seventy-one".