505261155 has 16 divisors (see below), whose sum is σ = 923906304. Its totient is φ = 230976480.

The previous prime is 505261153. The next prime is 505261177. The reversal of 505261155 is 551162505.

It is not a de Polignac number, because 505261155 - 2¹ = 505261153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (505261151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2405901 + ... + 2406110.

It is an arithmetic number, because the mean of its divisors is an integer number (57744144).

Almost surely, 2^505261155 is an apocalyptic number.

505261155 is a deficient number, since it is larger than the sum of its proper divisors (418645149).

505261155 is a wasteful number, since it uses less digits than its factorization.

505261155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4812026.

The product of its (nonzero) digits is 7500, while the sum is 30.

The square root of 505261155 is about 22478.0149257002. The cubic root of 505261155 is about 796.4746728000.

It can be divided in two parts, 50526 and 1155, that added together give a triangular number (51681 = T₃₂₁).

The spelling of 505261155 in words is "five hundred five million, two hundred sixty-one thousand, one hundred fifty-five".