55218372522 has 8 divisors (see below), whose sum is σ = 110436745056. Its totient is φ = 18406124172.

The previous prime is 55218372509. The next prime is 55218372523. The reversal of 55218372522 is 22527381255.

It is a sphenic number, since it is the product of 3 distinct primes.

55218372522 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (55218372523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4601531038 + ... + 4601531049.

It is an arithmetic number, because the mean of its divisors is an integer number (13804593132).

Almost surely, 2^55218372522 is an apocalyptic number.

55218372522 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

55218372522 is a wasteful number, since it uses less digits than its factorization.

55218372522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9203062092.

The product of its digits is 336000, while the sum is 42.

The spelling of 55218372522 in words is "fifty-five billion, two hundred eighteen million, three hundred seventy-two thousand, five hundred twenty-two".