264215155 has 4 divisors (see below), whose sum is σ = 317058192. Its totient is φ = 211372120.

The previous prime is 264215141. The next prime is 264215167. The reversal of 264215155 is 551512462.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-264215155 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26421511 + ... + 26421520.

It is an arithmetic number, because the mean of its divisors is an integer number (79264548).

Almost surely, 2^264215155 is an apocalyptic number.

264215155 is a deficient number, since it is larger than the sum of its proper divisors (52843037).

264215155 is an equidigital number, since it uses as much as digits as its factorization.

264215155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52843036.

The product of its digits is 12000, while the sum is 31.

The square root of 264215155 is about 16254.6963982721. The cubic root of 264215155 is about 641.6810906598.

The spelling of 264215155 in words is "two hundred sixty-four million, two hundred fifteen thousand, one hundred fifty-five".