99643222 has 64 divisors (see below), whose sum is σ = 191600640. Its totient is φ = 37863936.

The previous prime is 99643213. The next prime is 99643223. The reversal of 99643222 is 22234699.

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 (99643223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 596583 + ... + 596749.

It is an arithmetic number, because the mean of its divisors is an integer number (2993760).

Almost surely, 2^99643222 is an apocalyptic number.

99643222 is a deficient number, since it is larger than the sum of its proper divisors (91957418).

99643222 is a wasteful number, since it uses less digits than its factorization.

99643222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325.

The product of its digits is 46656, while the sum is 37.

The square root of 99643222 is about 9982.1451602348. The cubic root of 99643222 is about 463.6062199852.

The spelling of 99643222 in words is "ninety-nine million, six hundred forty-three thousand, two hundred twenty-two".