16131944 has 8 divisors (see below), whose sum is σ = 30247410. Its totient is φ = 8065968.

The previous prime is 16131943. The next prime is 16131949. The reversal of 16131944 is 44913161.

It can be written as a sum of positive squares in only one way, i.e., 15507844 + 624100 = 3938^2 + 790^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (16131943) 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 as a sum of consecutive naturals, namely, 1008239 + ... + 1008254.

Almost surely, 2^16131944 is an apocalyptic number.

It is an amenable number.

16131944 is a deficient number, since it is larger than the sum of its proper divisors (14115466).

16131944 is a wasteful number, since it uses less digits than its factorization.

16131944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2016499 (or 2016495 counting only the distinct ones).

The product of its digits is 2592, while the sum is 29.

The square root of 16131944 is about 4016.4591371007. The cubic root of 16131944 is about 252.6749772362.

The spelling of 16131944 in words is "sixteen million, one hundred thirty-one thousand, nine hundred forty-four".