31147994 has 16 divisors (see below), whose sum is σ = 49144320. Its totient is φ = 14785680.

The previous prime is 31147979. The next prime is 31147999. The reversal of 31147994 is 49974113.

It is not an unprimeable number, because it can be changed into a prime (31147999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1454 + ... + 8025.

It is an arithmetic number, because the mean of its divisors is an integer number (3071520).

Almost surely, 2^31147994 is an apocalyptic number.

31147994 is a deficient number, since it is larger than the sum of its proper divisors (17996326).

31147994 is a wasteful number, since it uses less digits than its factorization.

31147994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9565.

The product of its digits is 27216, while the sum is 38.

The square root of 31147994 is about 5581.0387921963. The cubic root of 31147994 is about 314.6371702118.

The spelling of 31147994 in words is "thirty-one million, one hundred forty-seven thousand, nine hundred ninety-four".