99221556 has 24 divisors (see below), whose sum is σ = 264591040. Its totient is φ = 28348992.

The previous prime is 99221543. The next prime is 99221569. The reversal of 99221556 is 65512299.

It is an interprime number because it is at equal distance from previous prime (99221543) and next prime (99221569).

It is a super-2 number, since 2×99221556² = 19689834350122272, 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, 590521 + ... + 590688.

Almost surely, 2^99221556 is an apocalyptic number.

It is an amenable number.

99221556 is an abundant number, since it is smaller than the sum of its proper divisors (165369484).

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

99221556 is a wasteful number, since it uses less digits than its factorization.

99221556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181223 (or 1181221 counting only the distinct ones).

The product of its digits is 48600, while the sum is 39.

The square root of 99221556 is about 9961.0017568516. The cubic root of 99221556 is about 462.9513389080.

The spelling of 99221556 in words is "ninety-nine million, two hundred twenty-one thousand, five hundred fifty-six".