31399234 has 8 divisors (see below), whose sum is σ = 47146428. Its totient is φ = 15683760.

The previous prime is 31399223. The next prime is 31399237. The reversal of 31399234 is 43299313.

It can be written as a sum of positive squares in 2 ways, for example, as 31393609 + 5625 = 5603^2 + 75^2 .

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 31399234.

It is not an unprimeable number, because it can be changed into a prime (31399237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5277 + ... + 9520.

Almost surely, 2^31399234 is an apocalyptic number.

31399234 is a deficient number, since it is larger than the sum of its proper divisors (15747194).

31399234 is a wasteful number, since it uses less digits than its factorization.

31399234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15860.

The product of its digits is 17496, while the sum is 34.

The square root of 31399234 is about 5603.5019407510. The cubic root of 31399234 is about 315.4808612707.

The spelling of 31399234 in words is "thirty-one million, three hundred ninety-nine thousand, two hundred thirty-four".