99218625 has 64 divisors (see below), whose sum is σ = 183306240. Its totient is φ = 47256000.

The previous prime is 99218621. The next prime is 99218659. The reversal of 99218625 is 52681299.

It is not a de Polignac number, because 99218625 - 2² = 99218621 is a prime.

It is a super-3 number, since 3×99218625³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (99218621) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 276196 + ... + 276554.

It is an arithmetic number, because the mean of its divisors is an integer number (2864160).

Almost surely, 2^99218625 is an apocalyptic number.

It is an amenable number.

99218625 is a deficient number, since it is larger than the sum of its proper divisors (84087615).

99218625 is a wasteful number, since it uses less digits than its factorization.

99218625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455 (or 445 counting only the distinct ones).

The product of its digits is 77760, while the sum is 42.

The square root of 99218625 is about 9960.8546320082. The cubic root of 99218625 is about 462.9467803430.

The spelling of 99218625 in words is "ninety-nine million, two hundred eighteen thousand, six hundred twenty-five".