161165515 has 8 divisors (see below), whose sum is σ = 221027040. Its totient is φ = 110513472.

The previous prime is 161165513. The next prime is 161165519. The reversal of 161165515 is 515561161.

161165515 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161165515 - 2¹ = 161165513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161165513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2302330 + ... + 2302399.

It is an arithmetic number, because the mean of its divisors is an integer number (27628380).

Almost surely, 2^161165515 is an apocalyptic number.

161165515 is a deficient number, since it is larger than the sum of its proper divisors (59861525).

161165515 is an equidigital number, since it uses as much as digits as its factorization.

161165515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4604741.

The product of its digits is 4500, while the sum is 31.

The square root of 161165515 is about 12695.0980697275. The cubic root of 161165515 is about 544.1985414198.

The spelling of 161165515 in words is "one hundred sixty-one million, one hundred sixty-five thousand, five hundred fifteen".