221792316 has 24 divisors (see below), whose sum is σ = 518891520. Its totient is φ = 73734192.

The previous prime is 221792309. The next prime is 221792327. The reversal of 221792316 is 613297122.

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, 19836 + ... + 28931.

It is an arithmetic number, because the mean of its divisors is an integer number (21620480).

Almost surely, 2^221792316 is an apocalyptic number.

It is an amenable number.

221792316 is an abundant number, since it is smaller than the sum of its proper divisors (297099204).

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

221792316 is a wasteful number, since it uses less digits than its factorization.

221792316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49153 (or 49151 counting only the distinct ones).

The product of its digits is 9072, while the sum is 33.

The square root of 221792316 is about 14892.6933762836. The cubic root of 221792316 is about 605.3160164023.

The spelling of 221792316 in words is "two hundred twenty-one million, seven hundred ninety-two thousand, three hundred sixteen".