255655551 has 8 divisors (see below), whose sum is σ = 340956720. Its totient is φ = 170395712.

The previous prime is 255655531. The next prime is 255655553. The reversal of 255655551 is 155556552.

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 255655551 - 2⁶ = 255655487 is a prime.

It is a super-2 number, since 2×255655551² = 130719521514227202, which contains 22 as substring.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255655553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9595 + ... + 24563.

It is an arithmetic number, because the mean of its divisors is an integer number (42619590).

Almost surely, 2^255655551 is an apocalyptic number.

255655551 is a deficient number, since it is larger than the sum of its proper divisors (85301169).

255655551 is a wasteful number, since it uses less digits than its factorization.

255655551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20665.

The product of its digits is 187500, while the sum is 39.

The square root of 255655551 is about 15989.2323455506. The cubic root of 255655551 is about 634.6755123918.

The spelling of 255655551 in words is "two hundred fifty-five million, six hundred fifty-five thousand, five hundred fifty-one".