31944147 has 16 divisors (see below), whose sum is σ = 43374240. Its totient is φ = 20908800.

The previous prime is 31944131. The next prime is 31944151. The reversal of 31944147 is 74144913.

It is not a de Polignac number, because 31944147 - 2⁴ = 31944131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31944197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47997 + ... + 48657.

It is an arithmetic number, because the mean of its divisors is an integer number (2710890).

Almost surely, 2^31944147 is an apocalyptic number.

31944147 is a deficient number, since it is larger than the sum of its proper divisors (11430093).

31944147 is a wasteful number, since it uses less digits than its factorization.

31944147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934.

The product of its digits is 12096, while the sum is 33.

The square root of 31944147 is about 5651.9153390687. The cubic root of 31944147 is about 317.2953921764.

The spelling of 31944147 in words is "thirty-one million, nine hundred forty-four thousand, one hundred forty-seven".