55122002442 has 64 divisors (see below), whose sum is σ = 132337887360. Its totient is φ = 16906361472.

The previous prime is 55122002371. The next prime is 55122002477. The reversal of 55122002442 is 24420022155.

55122002442 is a `hidden beast` number, since 5 + 5 + 12 + 200 + 2 + 442 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94293 + ... + 345159.

It is an arithmetic number, because the mean of its divisors is an integer number (2067779490).

Almost surely, 2^55122002442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55122002442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66168943680).

55122002442 is an abundant number, since it is smaller than the sum of its proper divisors (77215884918).

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

55122002442 is a wasteful number, since it uses less digits than its factorization.

55122002442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251204 (or 251198 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 27.

Adding to 55122002442 its reverse (24420022155), we get a palindrome (79542024597).

The spelling of 55122002442 in words is "fifty-five billion, one hundred twenty-two million, two thousand, four hundred forty-two".