161807315 has 4 divisors (see below), whose sum is σ = 194168784. Its totient is φ = 129445848.

The previous prime is 161807311. The next prime is 161807341. The reversal of 161807315 is 513708161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161807315 - 2² = 161807311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161807311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16180727 + ... + 16180736.

It is an arithmetic number, because the mean of its divisors is an integer number (48542196).

Almost surely, 2^161807315 is an apocalyptic number.

161807315 is a deficient number, since it is larger than the sum of its proper divisors (32361469).

161807315 is an equidigital number, since it uses as much as digits as its factorization.

161807315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32361468.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 161807315 is about 12720.3504275629. The cubic root of 161807315 is about 544.9199613123.

The spelling of 161807315 in words is "one hundred sixty-one million, eight hundred seven thousand, three hundred fifteen".