221022992 has 10 divisors (see below), whose sum is σ = 428232078. Its totient is φ = 110511488.

The previous prime is 221022983. The next prime is 221023003. The reversal of 221022992 is 299220122.

221022992 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 137921536 + 83101456 = 11744^2 + 9116^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6906953 + ... + 6906984.

Almost surely, 2^221022992 is an apocalyptic number.

It is an amenable number.

221022992 is a deficient number, since it is larger than the sum of its proper divisors (207209086).

221022992 is a wasteful number, since it uses less digits than its factorization.

221022992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13813945 (or 13813939 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 221022992 is about 14866.8420318506. The cubic root of 221022992 is about 604.6153254406.

The spelling of 221022992 in words is "two hundred twenty-one million, twenty-two thousand, nine hundred ninety-two".