99251865 has 64 divisors (see below), whose sum is σ = 190252800. Its totient is φ = 48909312.

The previous prime is 99251861. The next prime is 99251879. The reversal of 99251865 is 56815299.

It is not a de Polignac number, because 99251865 - 2² = 99251861 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 99251865.

It is not an unprimeable number, because it can be changed into a prime (99251861) 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, 135039 + ... + 135771.

It is an arithmetic number, because the mean of its divisors is an integer number (2972700).

Almost surely, 2^99251865 is an apocalyptic number.

It is an amenable number.

99251865 is a deficient number, since it is larger than the sum of its proper divisors (91000935).

99251865 is a wasteful number, since it uses less digits than its factorization.

99251865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823 (or 817 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The square root of 99251865 is about 9962.5230238128. The cubic root of 99251865 is about 462.9984730329.

The spelling of 99251865 in words is "ninety-nine million, two hundred fifty-one thousand, eight hundred sixty-five".