55615216 has 10 divisors (see below), whose sum is σ = 107754512. Its totient is φ = 27807600.

The previous prime is 55615213. The next prime is 55615247. The reversal of 55615216 is 61251655.

55615216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55615213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1737960 + ... + 1737991.

Almost surely, 2^55615216 is an apocalyptic number.

It is an amenable number.

55615216 is a deficient number, since it is larger than the sum of its proper divisors (52139296).

55615216 is a wasteful number, since it uses less digits than its factorization.

55615216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3475959 (or 3475953 counting only the distinct ones).

The product of its digits is 9000, while the sum is 31.

The square root of 55615216 is about 7457.5609953925. The cubic root of 55615216 is about 381.7079536410.

The spelling of 55615216 in words is "fifty-five million, six hundred fifteen thousand, two hundred sixteen".