551322320535 has 128 divisors (see below), whose sum is σ = 1169278156800. Its totient is φ = 241161338880.

The previous prime is 551322320513. The next prime is 551322320543. The reversal of 551322320535 is 535023223155.

551322320535 is a `hidden beast` number, since 5 + 5 + 1 + 322 + 320 + 5 + 3 + 5 = 666.

It is not a de Polignac number, because 551322320535 - 2¹⁰ = 551322319511 is a prime.

It is a super-2 number, since 2×551322320535² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 551322320535.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2501527 + ... + 2712983.

It is an arithmetic number, because the mean of its divisors is an integer number (9134985600).

Almost surely, 2^551322320535 is an apocalyptic number.

551322320535 is an abundant number, since it is smaller than the sum of its proper divisors (617955836265).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

551322320535 is a wasteful number, since it uses less digits than its factorization.

551322320535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211598 (or 211592 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 36.

The spelling of 551322320535 in words is "five hundred fifty-one billion, three hundred twenty-two million, three hundred twenty thousand, five hundred thirty-five".