55120051422 has 160 divisors (see below), whose sum is σ = 138476368800. Its totient is φ = 16285059072.

The previous prime is 55120051421. The next prime is 55120051447. The reversal of 55120051422 is 22415002155.

55120051422 is a `hidden beast` number, since 5 + 5 + 120 + 0 + 514 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55120051421) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 9049354 + ... + 9055442.

It is an arithmetic number, because the mean of its divisors is an integer number (865477305).

Almost surely, 2^55120051422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55120051422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69238184400).

55120051422 is an abundant number, since it is smaller than the sum of its proper divisors (83356317378).

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

55120051422 is a wasteful number, since it uses less digits than its factorization.

55120051422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6312 (or 6303 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

Adding to 55120051422 its reverse (22415002155), we get a palindrome (77535053577).

The spelling of 55120051422 in words is "fifty-five billion, one hundred twenty million, fifty-one thousand, four hundred twenty-two".