221356796 has 12 divisors (see below), whose sum is σ = 410161248. Its totient is φ = 104167872.

The previous prime is 221356763. The next prime is 221356799. The reversal of 221356796 is 697653122.

It is a super-2 number, since 2×221356796² = 97997662270771232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221356799) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1627556 + ... + 1627691.

It is an arithmetic number, because the mean of its divisors is an integer number (34180104).

Almost surely, 2^221356796 is an apocalyptic number.

It is an amenable number.

221356796 is a deficient number, since it is larger than the sum of its proper divisors (188804452).

221356796 is a wasteful number, since it uses less digits than its factorization.

221356796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3255268 (or 3255266 counting only the distinct ones).

The product of its digits is 136080, while the sum is 41.

The square root of 221356796 is about 14878.0642558096. The cubic root of 221356796 is about 604.9195494418.

The spelling of 221356796 in words is "two hundred twenty-one million, three hundred fifty-six thousand, seven hundred ninety-six".