31671418 has 8 divisors (see below), whose sum is σ = 47553012. Its totient is φ = 15820416.

The previous prime is 31671413. The next prime is 31671421. The reversal of 31671418 is 81417613.

It can be written as a sum of positive squares in 2 ways, for example, as 31505769 + 165649 = 5613^2 + 407^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 31671418.

It is not an unprimeable number, because it can be changed into a prime (31671413) 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 3 ways as a sum of consecutive naturals, for example, 4855 + ... + 9322.

Almost surely, 2^31671418 is an apocalyptic number.

31671418 is a deficient number, since it is larger than the sum of its proper divisors (15881594).

31671418 is a wasteful number, since it uses less digits than its factorization.

31671418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15296.

The product of its digits is 4032, while the sum is 31.

The square root of 31671418 is about 5627.7364899220. The cubic root of 31671418 is about 316.3898209499.

The spelling of 31671418 in words is "thirty-one million, six hundred seventy-one thousand, four hundred eighteen".