55423220120 has 32 divisors (see below), whose sum is σ = 126204689520. Its totient is φ = 21902186880.

The previous prime is 55423220087. The next prime is 55423220173. The reversal of 55423220120 is 2102232455.

It is a self number, because there is not a number n which added to its sum of digits gives 55423220120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8343551 + ... + 8350190.

Almost surely, 2^55423220120 is an apocalyptic number.

It is an amenable number.

55423220120 is an abundant number, since it is smaller than the sum of its proper divisors (70781469400).

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

55423220120 is a wasteful number, since it uses less digits than its factorization.

55423220120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16693835 (or 16693831 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 55423220120 its reverse (2102232455), we get a palindrome (57525452575).

The spelling of 55423220120 in words is "fifty-five billion, four hundred twenty-three million, two hundred twenty thousand, one hundred twenty".