55400152521 has 16 divisors (see below), whose sum is σ = 85289585024. Its totient is φ = 31330865664.

The previous prime is 55400152513. The next prime is 55400152531. The reversal of 55400152521 is 12525100455.

It is not a de Polignac number, because 55400152521 - 2³ = 55400152513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55400152531) 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, 13596430 + ... + 13600503.

It is an arithmetic number, because the mean of its divisors is an integer number (5330599064).

Almost surely, 2^55400152521 is an apocalyptic number.

It is an amenable number.

55400152521 is a deficient number, since it is larger than the sum of its proper divisors (29889432503).

55400152521 is a wasteful number, since it uses less digits than its factorization.

55400152521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27197040.

The product of its (nonzero) digits is 10000, while the sum is 30.

Adding to 55400152521 its reverse (12525100455), we get a palindrome (67925252976).

The spelling of 55400152521 in words is "fifty-five billion, four hundred million, one hundred fifty-two thousand, five hundred twenty-one".