99421215 has 16 divisors (see below), whose sum is σ = 162459648. Its totient is φ = 51896096.

The previous prime is 99421213. The next prime is 99421237. The reversal of 99421215 is 51212499.

It is a cyclic number.

It is not a de Polignac number, because 99421215 - 2¹ = 99421213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99421211) 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, 69807 + ... + 71216.

It is an arithmetic number, because the mean of its divisors is an integer number (10153728).

Almost surely, 2^99421215 is an apocalyptic number.

99421215 is a deficient number, since it is larger than the sum of its proper divisors (63038433).

99421215 is a wasteful number, since it uses less digits than its factorization.

99421215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141078.

The product of its digits is 6480, while the sum is 33.

The square root of 99421215 is about 9971.0187543701. The cubic root of 99421215 is about 463.2616561252.

The spelling of 99421215 in words is "ninety-nine million, four hundred twenty-one thousand, two hundred fifteen".