161192521 has 16 divisors (see below), whose sum is σ = 196387200. Its totient is φ = 129150720.

The previous prime is 161192519. The next prime is 161192531. The reversal of 161192521 is 125291161.

161192521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 161192521 - 2¹ = 161192519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161192521.

It is not an unprimeable number, because it can be changed into a prime (161192501) 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, 13186 + ... + 22276.

It is an arithmetic number, because the mean of its divisors is an integer number (12274200).

Almost surely, 2^161192521 is an apocalyptic number.

It is an amenable number.

161192521 is a deficient number, since it is larger than the sum of its proper divisors (35194679).

161192521 is a wasteful number, since it uses less digits than its factorization.

161192521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9264.

The product of its digits is 1080, while the sum is 28.

The square root of 161192521 is about 12696.1616640621. The cubic root of 161192521 is about 544.2289362699.

The spelling of 161192521 in words is "one hundred sixty-one million, one hundred ninety-two thousand, five hundred twenty-one".