161208115 has 4 divisors (see below), whose sum is σ = 193449744. Its totient is φ = 128966488.

The previous prime is 161208107. The next prime is 161208137. The reversal of 161208115 is 511802161.

It is a happy number.

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 161208115 - 2³ = 161208107 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 161208115.

It is an unprimeable number.

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, 16120807 + ... + 16120816.

It is an arithmetic number, because the mean of its divisors is an integer number (48362436).

Almost surely, 2^161208115 is an apocalyptic number.

161208115 is a deficient number, since it is larger than the sum of its proper divisors (32241629).

161208115 is an equidigital number, since it uses as much as digits as its factorization.

161208115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32241628.

The product of its (nonzero) digits is 480, while the sum is 25.

The square root of 161208115 is about 12696.7757718249. The cubic root of 161208115 is about 544.2464855382.

The spelling of 161208115 in words is "one hundred sixty-one million, two hundred eight thousand, one hundred fifteen".