265551155 has 4 divisors (see below), whose sum is σ = 318661392. Its totient is φ = 212440920.

The previous prime is 265551133. The next prime is 265551157. The reversal of 265551155 is 551155562.

It is a happy number.

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

It is not a de Polignac number, because 265551155 - 2¹⁴ = 265534771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (265551157) 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, 26555111 + ... + 26555120.

It is an arithmetic number, because the mean of its divisors is an integer number (79665348).

Almost surely, 2^265551155 is an apocalyptic number.

265551155 is a deficient number, since it is larger than the sum of its proper divisors (53110237).

265551155 is an equidigital number, since it uses as much as digits as its factorization.

265551155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53110236.

The product of its digits is 37500, while the sum is 35.

The square root of 265551155 is about 16295.7403943485. The cubic root of 265551155 is about 642.7608231117.

The spelling of 265551155 in words is "two hundred sixty-five million, five hundred fifty-one thousand, one hundred fifty-five".