55422216 has 48 divisors (see below), whose sum is σ = 150508800. Its totient is φ = 18424032.

The previous prime is 55422209. The next prime is 55422229. The reversal of 55422216 is 61222455.

It is a self number, because there is not a number n which added to its sum of digits gives 55422216.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33685 + ... + 35291.

It is an arithmetic number, because the mean of its divisors is an integer number (3135600).

Almost surely, 2^55422216 is an apocalyptic number.

It is an amenable number.

55422216 is an abundant number, since it is smaller than the sum of its proper divisors (95086584).

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

55422216 is a wasteful number, since it uses less digits than its factorization.

55422216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2098 (or 2091 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 55422216 is about 7444.6098621755. The cubic root of 55422216 is about 381.2658982531.

The spelling of 55422216 in words is "fifty-five million, four hundred twenty-two thousand, two hundred sixteen".