551565155 has 16 divisors (see below), whose sum is σ = 697670400. Its totient is φ = 417454560.

The previous prime is 551565149. The next prime is 551565167.

It is a happy number.

551565155 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 551565155 - 2⁸ = 551564899 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73466 + ... + 80624.

It is an arithmetic number, because the mean of its divisors is an integer number (43604400).

Almost surely, 2^551565155 is an apocalyptic number.

551565155 is a deficient number, since it is larger than the sum of its proper divisors (146105245).

551565155 is a wasteful number, since it uses less digits than its factorization.

551565155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7994.

The product of its digits is 93750, while the sum is 38.

The square root of 551565155 is about 23485.4243095585. The cubic root of 551565155 is about 820.0977253150.

The spelling of 551565155 in words is "five hundred fifty-one million, five hundred sixty-five thousand, one hundred fifty-five".