55220112156 has 48 divisors (see below), whose sum is σ = 140588098560. Its totient is φ = 16730056320.

The previous prime is 55220112149. The next prime is 55220112173. The reversal of 55220112156 is 65121102255.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 675040 + ... + 752408.

It is an arithmetic number, because the mean of its divisors is an integer number (2928918720).

Almost surely, 2^55220112156 is an apocalyptic number.

It is an amenable number.

55220112156 is an abundant number, since it is smaller than the sum of its proper divisors (85367986404).

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

55220112156 is a wasteful number, since it uses less digits than its factorization.

55220112156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82794 (or 82792 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 30.

Subtracting 55220112156 from its reverse (65121102255), we obtain a palindrome (9900990099).

The spelling of 55220112156 in words is "fifty-five billion, two hundred twenty million, one hundred twelve thousand, one hundred fifty-six".