265170155 has 4 divisors (see below), whose sum is σ = 318204192. Its totient is φ = 212136120.

The previous prime is 265170133. The next prime is 265170181. The reversal of 265170155 is 551071562.

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

It is not a de Polignac number, because 265170155 - 2¹⁴ = 265153771 is a prime.

It is a super-2 number, since 2×265170155² = 140630422205448050, which contains 22 as substring.

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, 26517011 + ... + 26517020.

It is an arithmetic number, because the mean of its divisors is an integer number (79551048).

Almost surely, 2^265170155 is an apocalyptic number.

265170155 is a deficient number, since it is larger than the sum of its proper divisors (53034037).

265170155 is an equidigital number, since it uses as much as digits as its factorization.

265170155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53034036.

The product of its (nonzero) digits is 10500, while the sum is 32.

The square root of 265170155 is about 16284.0460267097. The cubic root of 265170155 is about 642.4532752286.

The spelling of 265170155 in words is "two hundred sixty-five million, one hundred seventy thousand, one hundred fifty-five".