655224216 has 32 divisors (see below), whose sum is σ = 1646304000. Its totient is φ = 217308960.

The previous prime is 655224197. The next prime is 655224221. The reversal of 655224216 is 612422556.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63820 + ... + 73371.

It is an arithmetic number, because the mean of its divisors is an integer number (51447000).

Almost surely, 2^655224216 is an apocalyptic number.

It is an amenable number.

655224216 is an abundant number, since it is smaller than the sum of its proper divisors (991079784).

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

655224216 is a wasteful number, since it uses less digits than its factorization.

655224216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137399 (or 137395 counting only the distinct ones).

The product of its digits is 28800, while the sum is 33.

The square root of 655224216 is about 25597.3478313672. The cubic root of 655224216 is about 868.5536438306.

The spelling of 655224216 in words is "six hundred fifty-five million, two hundred twenty-four thousand, two hundred sixteen".