99221430 has 64 divisors (see below), whose sum is σ = 296898048. Its totient is φ = 20616960.

The previous prime is 99221429. The next prime is 99221443. The reversal of 99221430 is 3412299.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19167 + ... + 23786.

It is an arithmetic number, because the mean of its divisors is an integer number (4639032).

Almost surely, 2^99221430 is an apocalyptic number.

99221430 is an abundant number, since it is smaller than the sum of its proper divisors (197676618).

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

99221430 is a wasteful number, since it uses less digits than its factorization.

99221430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42981.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 99221430 is about 9960.9954321845. The cubic root of 99221430 is about 462.9511429429.

It can be divided in two parts, 992 and 21430, that added together give a palindrome (22422).

The spelling of 99221430 in words is "ninety-nine million, two hundred twenty-one thousand, four hundred thirty".