161315883 has 6 divisors (see below), whose sum is σ = 233011844. Its totient is φ = 107543916.

The previous prime is 161315881. The next prime is 161315897. The reversal of 161315883 is 388513161.

It is not a de Polignac number, because 161315883 - 2¹ = 161315881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161315881) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8961985 + ... + 8962002.

Almost surely, 2^161315883 is an apocalyptic number.

161315883 is a deficient number, since it is larger than the sum of its proper divisors (71695961).

161315883 is a wasteful number, since it uses less digits than its factorization.

161315883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17923993 (or 17923990 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 161315883 is about 12701.0189748697. The cubic root of 161315883 is about 544.3677352043.

The spelling of 161315883 in words is "one hundred sixty-one million, three hundred fifteen thousand, eight hundred eighty-three".