161383161 has 4 divisors (see below), whose sum is σ = 215177552. Its totient is φ = 107588772.

The previous prime is 161383147. The next prime is 161383163.

161383161 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 161383161 - 2²⁷ = 27165433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161383163) 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, 26897191 + ... + 26897196.

It is an arithmetic number, because the mean of its divisors is an integer number (53794388).

Almost surely, 2^161383161 is an apocalyptic number.

It is an amenable number.

161383161 is a deficient number, since it is larger than the sum of its proper divisors (53794391).

161383161 is an equidigital number, since it uses as much as digits as its factorization.

161383161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53794390.

The product of its digits is 2592, while the sum is 30.

The square root of 161383161 is about 12703.6672264351. The cubic root of 161383161 is about 544.4434022363.

The spelling of 161383161 in words is "one hundred sixty-one million, three hundred eighty-three thousand, one hundred sixty-one".