551505131 has 4 divisors (see below), whose sum is σ = 551604552. Its totient is φ = 551405712.

The previous prime is 551505113. The next prime is 551505137. The reversal of 551505131 is 131505155.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551505131 is a prime.

It is a super-2 number, since 2×551505131² = 608315819038654322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 551505131.

It is not an unprimeable number, because it can be changed into a prime (551505137) 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 3 ways as a sum of consecutive naturals, for example, 40865 + ... + 52658.

It is an arithmetic number, because the mean of its divisors is an integer number (137901138).

Almost surely, 2^551505131 is an apocalyptic number.

551505131 is a deficient number, since it is larger than the sum of its proper divisors (99421).

551505131 is an equidigital number, since it uses as much as digits as its factorization.

551505131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99420.

The product of its (nonzero) digits is 1875, while the sum is 26.

The square root of 551505131 is about 23484.1463758000. The cubic root of 551505131 is about 820.0679752295.

The spelling of 551505131 in words is "five hundred fifty-one million, five hundred five thousand, one hundred thirty-one".