161553113 has 8 divisors (see below), whose sum is σ = 167848200. Its totient is φ = 155306368.

The previous prime is 161553103. The next prime is 161553163. The reversal of 161553113 is 311355161.

It can be written as a sum of positive squares in 4 ways, for example, as 85264 + 161467849 = 292^2 + 12707^2 .

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

It is not a de Polignac number, because 161553113 - 2⁸ = 161552857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161553103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5198 + ... + 18711.

It is an arithmetic number, because the mean of its divisors is an integer number (20981025).

Almost surely, 2^161553113 is an apocalyptic number.

It is an amenable number.

161553113 is a deficient number, since it is larger than the sum of its proper divisors (6295087).

161553113 is a wasteful number, since it uses less digits than its factorization.

161553113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24171.

The product of its digits is 1350, while the sum is 26.

The square root of 161553113 is about 12710.3545583906. The cubic root of 161553113 is about 544.6344522871.

The spelling of 161553113 in words is "one hundred sixty-one million, five hundred fifty-three thousand, one hundred thirteen".