551855213 has 32 divisors (see below), whose sum is σ = 694122240. Its totient is φ = 427161600.

The previous prime is 551855177. The next prime is 551855219. The reversal of 551855213 is 312558155.

It is a cyclic number.

It is not a de Polignac number, because 551855213 - 2¹² = 551851117 is a prime.

It is a super-2 number, since 2×551855213² = 609088352230550738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551855219) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 891218 + ... + 891836.

It is an arithmetic number, because the mean of its divisors is an integer number (21691320).

Almost surely, 2^551855213 is an apocalyptic number.

It is an amenable number.

551855213 is a deficient number, since it is larger than the sum of its proper divisors (142267027).

551855213 is a wasteful number, since it uses less digits than its factorization.

551855213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837.

The product of its digits is 30000, while the sum is 35.

The square root of 551855213 is about 23491.5987748812. The cubic root of 551855213 is about 820.2414582405.

The spelling of 551855213 in words is "five hundred fifty-one million, eight hundred fifty-five thousand, two hundred thirteen".