264215399 has 6 divisors (see below), whose sum is σ = 307352664. Its totient is φ = 226470300.

The previous prime is 264215383. The next prime is 264215407. The reversal of 264215399 is 993512462.

It is not a de Polignac number, because 264215399 - 2⁴ = 264215383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264215359) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2696027 + ... + 2696124.

It is an arithmetic number, because the mean of its divisors is an integer number (51225444).

Almost surely, 2^264215399 is an apocalyptic number.

264215399 is a deficient number, since it is larger than the sum of its proper divisors (43137265).

264215399 is an equidigital number, since it uses as much as digits as its factorization.

264215399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5392165 (or 5392158 counting only the distinct ones).

The product of its digits is 116640, while the sum is 41.

The square root of 264215399 is about 16254.7039037935. The cubic root of 264215399 is about 641.6812881884.

The spelling of 264215399 in words is "two hundred sixty-four million, two hundred fifteen thousand, three hundred ninety-nine".