161515005 has 16 divisors (see below), whose sum is σ = 259511040. Its totient is φ = 85779008.

The previous prime is 161514973. The next prime is 161515061. The reversal of 161515005 is 500515161.

161515005 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 161515005 - 2⁵ = 161514973 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18942 + ... + 26111.

It is an arithmetic number, because the mean of its divisors is an integer number (16219440).

Almost surely, 2^161515005 is an apocalyptic number.

161515005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161515005 is a deficient number, since it is larger than the sum of its proper divisors (97996035).

161515005 is a wasteful number, since it uses less digits than its factorization.

161515005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45300.

The product of its (nonzero) digits is 750, while the sum is 24.

The square root of 161515005 is about 12708.8553772557. The cubic root of 161515005 is about 544.5916251709.

The spelling of 161515005 in words is "one hundred sixty-one million, five hundred fifteen thousand, five".