55542216 has 16 divisors (see below), whose sum is σ = 138855600. Its totient is φ = 18514064.

The previous prime is 55542211. The next prime is 55542229. The reversal of 55542216 is 61224555.

It is not an unprimeable number, because it can be changed into a prime (55542211) 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, 1157106 + ... + 1157153.

It is an arithmetic number, because the mean of its divisors is an integer number (8678475).

Almost surely, 2^55542216 is an apocalyptic number.

It is an amenable number.

55542216 is an abundant number, since it is smaller than the sum of its proper divisors (83313384).

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

55542216 is a wasteful number, since it uses less digits than its factorization.

55542216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2314268 (or 2314264 counting only the distinct ones).

The product of its digits is 12000, while the sum is 30.

The square root of 55542216 is about 7452.6650266868. The cubic root of 55542216 is about 381.5408717813.

The spelling of 55542216 in words is "fifty-five million, five hundred forty-two thousand, two hundred sixteen".