55415216 has 20 divisors (see below), whose sum is σ = 108881424. Its totient is φ = 27316800.

The previous prime is 55415207. The next prime is 55415221. The reversal of 55415216 is 61251455.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23255 + ... + 25526.

Almost surely, 2^55415216 is an apocalyptic number.

It is an amenable number.

55415216 is a deficient number, since it is larger than the sum of its proper divisors (53466208).

55415216 is a wasteful number, since it uses less digits than its factorization.

55415216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48860 (or 48854 counting only the distinct ones).

The product of its digits is 6000, while the sum is 29.

The square root of 55415216 is about 7444.1397085224. The cubic root of 55415216 is about 381.2498458837.

The spelling of 55415216 in words is "fifty-five million, four hundred fifteen thousand, two hundred sixteen".