551325207231 has 72 divisors (see below), whose sum is σ = 856126012560. Its totient is φ = 341784354816.

The previous prime is 551325207157. The next prime is 551325207233. The reversal of 551325207231 is 132702523155.

551325207231 is a `hidden beast` number, since 5 + 5 + 1 + 32 + 520 + 72 + 31 = 666.

It is not a de Polignac number, because 551325207231 - 2¹⁹ = 551324682943 is a prime.

It is a super-2 number, since 2×551325207231² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551325207233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 186446005 + ... + 186448961.

Almost surely, 2^551325207231 is an apocalyptic number.

551325207231 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

551325207231 is a deficient number, since it is larger than the sum of its proper divisors (304800805329).

551325207231 is a wasteful number, since it uses less digits than its factorization.

551325207231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3833 (or 3813 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 36.

The spelling of 551325207231 in words is "five hundred fifty-one billion, three hundred twenty-five million, two hundred seven thousand, two hundred thirty-one".