161105715 has 12 divisors (see below), whose sum is σ = 279249984. Its totient is φ = 85923024.

The previous prime is 161105713. The next prime is 161105717. The reversal of 161105715 is 517501161.

It is a happy number.

161105715 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (161105713) and next prime (161105717).

It is not a de Polignac number, because 161105715 - 2¹ = 161105713 is a prime.

It is a super-2 number, since 2×161105715² = 51910102811322450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161105713) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1790019 + ... + 1790108.

It is an arithmetic number, because the mean of its divisors is an integer number (23270832).

Almost surely, 2^161105715 is an apocalyptic number.

161105715 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161105715 is a deficient number, since it is larger than the sum of its proper divisors (118144269).

161105715 is a wasteful number, since it uses less digits than its factorization.

161105715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3580138 (or 3580135 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 27.

The square root of 161105715 is about 12692.7426114296. The cubic root of 161105715 is about 544.1312253264.

Adding to 161105715 its reverse (517501161), we get a palindrome (678606876).

The spelling of 161105715 in words is "one hundred sixty-one million, one hundred five thousand, seven hundred fifteen".