31920314 has 8 divisors (see below), whose sum is σ = 47908308. Its totient is φ = 15950880.

The previous prime is 31920313. The next prime is 31920337. The reversal of 31920314 is 41302913.

It can be written as a sum of positive squares in 2 ways, for example, as 31866025 + 54289 = 5645^2 + 233^2 .

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 31920314.

It is not an unprimeable number, because it can be changed into a prime (31920313) 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, 1064 + ... + 8060.

Almost surely, 2^31920314 is an apocalyptic number.

31920314 is a deficient number, since it is larger than the sum of its proper divisors (15987994).

31920314 is a wasteful number, since it uses less digits than its factorization.

31920314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9280.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 31920314 is about 5649.8065453606. The cubic root of 31920314 is about 317.2164629283.

The spelling of 31920314 in words is "thirty-one million, nine hundred twenty thousand, three hundred fourteen".