161131344 has 60 divisors (see below), whose sum is σ = 457554048. Its totient is φ = 48825920.

The previous prime is 161131339. The next prime is 161131349. The reversal of 161131344 is 443131161.

It is an interprime number because it is at equal distance from previous prime (161131339) and next prime (161131349).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161131349) 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 11 ways as a sum of consecutive naturals, for example, 8064 + ... + 19679.

Almost surely, 2^161131344 is an apocalyptic number.

It is an amenable number.

161131344 is an abundant number, since it is smaller than the sum of its proper divisors (296422704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161131344 is a wasteful number, since it uses less digits than its factorization.

161131344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27776 (or 27759 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

The square root of 161131344 is about 12693.7521639585. The cubic root of 161131344 is about 544.1600776025.

The spelling of 161131344 in words is "one hundred sixty-one million, one hundred thirty-one thousand, three hundred forty-four".