55021415120 has 160 divisors (see below), whose sum is σ = 152916498432. Its totient is φ = 18001691136.

The previous prime is 55021415089. The next prime is 55021415123. The reversal of 55021415120 is 2151412055.

It is a super-2 number, since 2×55021415120² (a number of 22 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 55021415120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55021415123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5701019 + ... + 5710661.

Almost surely, 2^55021415120 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55021415120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76458249216).

55021415120 is an abundant number, since it is smaller than the sum of its proper divisors (97895083312).

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

55021415120 is a wasteful number, since it uses less digits than its factorization.

55021415120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10129 (or 10123 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 26.

Adding to 55021415120 its reverse (2151412055), we get a palindrome (57172827175).

The spelling of 55021415120 in words is "fifty-five billion, twenty-one million, four hundred fifteen thousand, one hundred twenty".