155261115 has 24 divisors (see below), whose sum is σ = 274201200. Its totient is φ = 81242304.

The previous prime is 155261111. The next prime is 155261143. The reversal of 155261115 is 511162551.

It is not a de Polignac number, because 155261115 - 2² = 155261111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155261111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30165 + ... + 34934.

It is an arithmetic number, because the mean of its divisors is an integer number (11425050).

Almost surely, 2^155261115 is an apocalyptic number.

155261115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

155261115 is a deficient number, since it is larger than the sum of its proper divisors (118940085).

155261115 is a wasteful number, since it uses less digits than its factorization.

155261115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65163 (or 65160 counting only the distinct ones).

The product of its digits is 1500, while the sum is 27.

The square root of 155261115 is about 12460.3818159798. The cubic root of 155261115 is about 537.4700066191.

It can be divided in two parts, 15526 and 1115, that added together give a square (16641 = 129²).

The spelling of 155261115 in words is "one hundred fifty-five million, two hundred sixty-one thousand, one hundred fifteen".