161003915 has 8 divisors (see below), whose sum is σ = 193351200. Its totient is φ = 128705472.

The previous prime is 161003903. The next prime is 161003917. The reversal of 161003915 is 519300161.

161003915 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 161003915 - 2⁶ = 161003851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161003917) 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, 4514 + ... + 18503.

It is an arithmetic number, because the mean of its divisors is an integer number (24168900).

Almost surely, 2^161003915 is an apocalyptic number.

161003915 is a deficient number, since it is larger than the sum of its proper divisors (32347285).

161003915 is a wasteful number, since it uses less digits than its factorization.

161003915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24421.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 161003915 is about 12688.7318121237. The cubic root of 161003915 is about 544.0165920455.

The spelling of 161003915 in words is "one hundred sixty-one million, three thousand, nine hundred fifteen".