161215107 has 4 divisors (see below), whose sum is σ = 214953480. Its totient is φ = 107476736.

The previous prime is 161215099. The next prime is 161215111. The reversal of 161215107 is 701512161.

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 161215107 - 2³ = 161215099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161215177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26869182 + ... + 26869187.

It is an arithmetic number, because the mean of its divisors is an integer number (53738370).

Almost surely, 2^161215107 is an apocalyptic number.

161215107 is a deficient number, since it is larger than the sum of its proper divisors (53738373).

161215107 is an equidigital number, since it uses as much as digits as its factorization.

161215107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53738372.

The product of its (nonzero) digits is 420, while the sum is 24.

The square root of 161215107 is about 12697.0511143336. The cubic root of 161215107 is about 544.2543538691.

Adding to 161215107 its reverse (701512161), we get a palindrome (862727268).

The spelling of 161215107 in words is "one hundred sixty-one million, two hundred fifteen thousand, one hundred seven".