161117015 has 8 divisors (see below), whose sum is σ = 193624368. Its totient is φ = 128704320.

The previous prime is 161117009. The next prime is 161117051. The reversal of 161117015 is 510711161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161117015 - 2¹⁸ = 160854871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19862 + ... + 26771.

It is an arithmetic number, because the mean of its divisors is an integer number (24203046).

Almost surely, 2^161117015 is an apocalyptic number.

161117015 is a deficient number, since it is larger than the sum of its proper divisors (32507353).

161117015 is an equidigital number, since it uses as much as digits as its factorization.

161117015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47329.

The product of its (nonzero) digits is 210, while the sum is 23.

The square root of 161117015 is about 12693.1877398863. The cubic root of 161117015 is about 544.1439468678.

Adding to 161117015 its reverse (510711161), we get a palindrome (671828176).

The spelling of 161117015 in words is "one hundred sixty-one million, one hundred seventeen thousand, fifteen".