221796984 has 32 divisors (see below), whose sum is σ = 554890320. Its totient is φ = 73879296.

The previous prime is 221796979. The next prime is 221797061. The reversal of 221796984 is 489697122.

221796984 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221796984² = 98387804222992512, which contains 22 as substring.

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, 45514 + ... + 50150.

Almost surely, 2^221796984 is an apocalyptic number.

221796984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

221796984 is an abundant number, since it is smaller than the sum of its proper divisors (333093336).

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

221796984 is a wasteful number, since it uses less digits than its factorization.

221796984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6639 (or 6635 counting only the distinct ones).

The product of its digits is 435456, while the sum is 48.

The square root of 221796984 is about 14892.8500966068. The cubic root of 221796984 is about 605.3202630107.

The spelling of 221796984 in words is "two hundred twenty-one million, seven hundred ninety-six thousand, nine hundred eighty-four".