99321565 has 32 divisors (see below), whose sum is σ = 146119680. Its totient is φ = 63258624.

The previous prime is 99321559. The next prime is 99321581. The reversal of 99321565 is 56512399.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 99321565 - 2⁵ = 99321533 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45949 + ... + 48061.

It is an arithmetic number, because the mean of its divisors is an integer number (4566240).

Almost surely, 2^99321565 is an apocalyptic number.

It is an amenable number.

99321565 is a deficient number, since it is larger than the sum of its proper divisors (46798115).

99321565 is a wasteful number, since it uses less digits than its factorization.

99321565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2221.

The product of its digits is 72900, while the sum is 40.

The square root of 99321565 is about 9966.0205197461. The cubic root of 99321565 is about 463.1068284859.

The spelling of 99321565 in words is "ninety-nine million, three hundred twenty-one thousand, five hundred sixty-five".