55501551431 has 16 divisors (see below), whose sum is σ = 60064727040. Its totient is φ = 51084420480.

The previous prime is 55501551409. The next prime is 55501551451. The reversal of 55501551431 is 13415510555.

It is a cyclic number.

It is not a de Polignac number, because 55501551431 - 2³⁰ = 54427809607 is a prime.

It is a super-2 number, since 2×55501551431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55501551391 and 55501551400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55501551401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 994766 + ... + 1049076.

It is an arithmetic number, because the mean of its divisors is an integer number (3754045440).

Almost surely, 2^55501551431 is an apocalyptic number.

55501551431 is a deficient number, since it is larger than the sum of its proper divisors (4563175609).

55501551431 is a wasteful number, since it uses less digits than its factorization.

55501551431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55654.

The product of its (nonzero) digits is 37500, while the sum is 35.

The spelling of 55501551431 in words is "fifty-five billion, five hundred one million, five hundred fifty-one thousand, four hundred thirty-one".