99621226 has 16 divisors (see below), whose sum is σ = 153675648. Its totient is φ = 48405600.

The previous prime is 99621209. The next prime is 99621229. The reversal of 99621226 is 62212699.

It is not an unprimeable number, because it can be changed into a prime (99621229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19981 + ... + 24463.

It is an arithmetic number, because the mean of its divisors is an integer number (9604728).

Almost surely, 2^99621226 is an apocalyptic number.

99621226 is a deficient number, since it is larger than the sum of its proper divisors (54054422).

99621226 is a wasteful number, since it uses less digits than its factorization.

99621226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4797.

The product of its digits is 23328, while the sum is 37.

The square root of 99621226 is about 9981.0433322374. The cubic root of 99621226 is about 463.5721041579.

It can be divided in two parts, 996 and 21226, that added together give a palindrome (22222).

The spelling of 99621226 in words is "ninety-nine million, six hundred twenty-one thousand, two hundred twenty-six".