275815165 has 4 divisors (see below), whose sum is σ = 330978204. Its totient is φ = 220652128.

The previous prime is 275815139. The next prime is 275815213. The reversal of 275815165 is 561518572.

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 219099204 + 56715961 = 14802^2 + 7531^2 .

It is a cyclic number.

It is not a de Polignac number, because 275815165 - 2⁷ = 275815037 is a prime.

It is a Duffinian number.

It is a congruent 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, 27581512 + ... + 27581521.

It is an arithmetic number, because the mean of its divisors is an integer number (82744551).

Almost surely, 2^275815165 is an apocalyptic number.

It is an amenable number.

275815165 is a deficient number, since it is larger than the sum of its proper divisors (55163039).

275815165 is an equidigital number, since it uses as much as digits as its factorization.

275815165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55163038.

The product of its digits is 84000, while the sum is 40.

The square root of 275815165 is about 16607.6839143813. The cubic root of 275815165 is about 650.9376329958.

The spelling of 275815165 in words is "two hundred seventy-five million, eight hundred fifteen thousand, one hundred sixty-five".