31690514 has 8 divisors (see below), whose sum is σ = 47561148. Its totient is φ = 15836800.

The previous prime is 31690501. The next prime is 31690543. The reversal of 31690514 is 41509613.

It can be written as a sum of positive squares in 2 ways, for example, as 30085225 + 1605289 = 5485^2 + 1267^2 .

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

It is a Curzon number.

It is an unprimeable number.

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, 2774 + ... + 8430.

Almost surely, 2^31690514 is an apocalyptic number.

31690514 is a deficient number, since it is larger than the sum of its proper divisors (15870634).

31690514 is a wasteful number, since it uses less digits than its factorization.

31690514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8460.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 31690514 is about 5629.4328311119. The cubic root of 31690514 is about 316.4533963178.

The spelling of 31690514 in words is "thirty-one million, six hundred ninety thousand, five hundred fourteen".