264131165 has 4 divisors (see below), whose sum is σ = 316957404. Its totient is φ = 211304928.

The previous prime is 264131137. The next prime is 264131167. The reversal of 264131165 is 561131462.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 48246916 + 215884249 = 6946^2 + 14693^2 .

It is a cyclic number.

It is not a de Polignac number, because 264131165 - 2¹² = 264127069 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 (264131167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26413112 + ... + 26413121.

It is an arithmetic number, because the mean of its divisors is an integer number (79239351).

Almost surely, 2^264131165 is an apocalyptic number.

It is an amenable number.

264131165 is a deficient number, since it is larger than the sum of its proper divisors (52826239).

264131165 is an equidigital number, since it uses as much as digits as its factorization.

264131165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52826238.

The product of its digits is 4320, while the sum is 29.

The square root of 264131165 is about 16252.1126319011. The cubic root of 264131165 is about 641.6130898840.

The spelling of 264131165 in words is "two hundred sixty-four million, one hundred thirty-one thousand, one hundred sixty-five".