99227221 has 16 divisors (see below), whose sum is σ = 106091136. Its totient is φ = 92606976.

The previous prime is 99227197. The next prime is 99227237. The reversal of 99227221 is 12272299.

It is a cyclic number.

It is not a de Polignac number, because 99227221 - 2⁹ = 99226709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99227021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189466 + ... + 189988.

It is an arithmetic number, because the mean of its divisors is an integer number (6630696).

Almost surely, 2^99227221 is an apocalyptic number.

It is an amenable number.

99227221 is a deficient number, since it is larger than the sum of its proper divisors (6863915).

99227221 is a wasteful number, since it uses less digits than its factorization.

99227221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732.

The product of its digits is 9072, while the sum is 34.

The square root of 99227221 is about 9961.2861117428. The cubic root of 99227221 is about 462.9601493907.

The spelling of 99227221 in words is "ninety-nine million, two hundred twenty-seven thousand, two hundred twenty-one".