161087155 has 24 divisors (see below), whose sum is σ = 210430080. Its totient is φ = 118287360.

The previous prime is 161087123. The next prime is 161087177. The reversal of 161087155 is 551780161.

It is not a de Polignac number, because 161087155 - 2⁵ = 161087123 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161087155.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57886 + ... + 60604.

It is an arithmetic number, because the mean of its divisors is an integer number (8767920).

Almost surely, 2^161087155 is an apocalyptic number.

161087155 is a deficient number, since it is larger than the sum of its proper divisors (49342925).

161087155 is a wasteful number, since it uses less digits than its factorization.

161087155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2799 (or 2782 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 34.

The square root of 161087155 is about 12692.0114639091. The cubic root of 161087155 is about 544.1103291850.

The spelling of 161087155 in words is "one hundred sixty-one million, eighty-seven thousand, one hundred fifty-five".