551505155 has 16 divisors (see below), whose sum is σ = 702293760. Its totient is φ = 414863328.

The previous prime is 551505137. The next prime is 551505161.

551505155 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 551505155 - 2¹⁰ = 551504131 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33857 + ... + 47426.

It is an arithmetic number, because the mean of its divisors is an integer number (43893360).

Almost surely, 2^551505155 is an apocalyptic number.

551505155 is a deficient number, since it is larger than the sum of its proper divisors (150788605).

551505155 is a wasteful number, since it uses less digits than its factorization.

551505155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81370.

The product of its (nonzero) digits is 15625, while the sum is 32.

The square root of 551505155 is about 23484.1468867830. The cubic root of 551505155 is about 820.0679871252.

The spelling of 551505155 in words is "five hundred fifty-one million, five hundred five thousand, one hundred fifty-five".