55528857431 has 16 divisors (see below), whose sum is σ = 56476168320. Its totient is φ = 54590669280.

The previous prime is 55528857413. The next prime is 55528857451. The reversal of 55528857431 is 13475882555.

It is a cyclic number.

It is not a de Polignac number, because 55528857431 - 2²⁶ = 55461748567 is a prime.

It is a super-2 number, since 2×55528857431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55528857451) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 12274736 + ... + 12279258.

It is an arithmetic number, because the mean of its divisors is an integer number (3529760520).

Almost surely, 2^55528857431 is an apocalyptic number.

55528857431 is a deficient number, since it is larger than the sum of its proper divisors (947310889).

55528857431 is a wasteful number, since it uses less digits than its factorization.

55528857431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5486.

The product of its digits is 6720000, while the sum is 53.

The spelling of 55528857431 in words is "fifty-five billion, five hundred twenty-eight million, eight hundred fifty-seven thousand, four hundred thirty-one".