99885221 has 4 divisors (see below), whose sum is σ = 100325472. Its totient is φ = 99444972.

The previous prime is 99885211. The next prime is 99885239. The reversal of 99885221 is 12258899.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 99885221 - 2⁶ = 99885157 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99885211) 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, 219785 + ... + 220238.

It is an arithmetic number, because the mean of its divisors is an integer number (25081368).

Almost surely, 2^99885221 is an apocalyptic number.

It is an amenable number.

99885221 is a deficient number, since it is larger than the sum of its proper divisors (440251).

99885221 is a wasteful number, since it uses less digits than its factorization.

99885221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440250.

The product of its digits is 103680, while the sum is 44.

The square root of 99885221 is about 9994.2594022769. The cubic root of 99885221 is about 463.9812297327.

The spelling of 99885221 in words is "ninety-nine million, eight hundred eighty-five thousand, two hundred twenty-one".