551311551 has 24 divisors (see below), whose sum is σ = 929470464. Its totient is φ = 308330640.

The previous prime is 551311529. The next prime is 551311567. The reversal of 551311551 is 155113155.

It is not a de Polignac number, because 551311551 - 2⁶ = 551311487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551311571) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 90135 + ... + 96056.

It is an arithmetic number, because the mean of its divisors is an integer number (38727936).

Almost surely, 2^551311551 is an apocalyptic number.

551311551 is a deficient number, since it is larger than the sum of its proper divisors (378158913).

551311551 is a wasteful number, since it uses less digits than its factorization.

551311551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186251 (or 186248 counting only the distinct ones).

The product of its digits is 1875, while the sum is 27.

The square root of 551311551 is about 23480.0245102087. The cubic root of 551311551 is about 819.9720152060.

The spelling of 551311551 in words is "five hundred fifty-one million, three hundred eleven thousand, five hundred fifty-one".