221010998 has 16 divisors (see below), whose sum is σ = 358386336. Its totient is φ = 101614080.

The previous prime is 221010971. The next prime is 221011057. The reversal of 221010998 is 899010122.

It is a happy number.

221010998 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 2×221010998² = 97691722473912008, 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, 9323 + ... + 22998.

It is an arithmetic number, because the mean of its divisors is an integer number (22399146).

Almost surely, 2^221010998 is an apocalyptic number.

221010998 is a deficient number, since it is larger than the sum of its proper divisors (137375338).

221010998 is a wasteful number, since it uses less digits than its factorization.

221010998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32599.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 221010998 is about 14866.4386454860. The cubic root of 221010998 is about 604.6043885884.

The spelling of 221010998 in words is "two hundred twenty-one million, ten thousand, nine hundred ninety-eight".