55216650 has 24 divisors (see below), whose sum is σ = 136937664. Its totient is φ = 14724400.

The previous prime is 55216649. The next prime is 55216741. The reversal of 55216650 is 5661255.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 183906 + ... + 184205.

It is an arithmetic number, because the mean of its divisors is an integer number (5705736).

Almost surely, 2^55216650 is an apocalyptic number.

55216650 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55216650 is an abundant number, since it is smaller than the sum of its proper divisors (81721014).

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

55216650 is a wasteful number, since it uses less digits than its factorization.

55216650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368126 (or 368121 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 55216650 is about 7430.7906712543. The cubic root of 55216650 is about 380.7939310419.

The spelling of 55216650 in words is "fifty-five million, two hundred sixteen thousand, six hundred fifty".