31530650 has 12 divisors (see below), whose sum is σ = 58647102. Its totient is φ = 12612240.

The previous prime is 31530649. The next prime is 31530659. The reversal of 31530650 is 5603513.

It can be written as a sum of positive squares in 3 ways, for example, as 30349081 + 1181569 = 5509^2 + 1087^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31530659) 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 5 ways as a sum of consecutive naturals, for example, 315257 + ... + 315356.

Almost surely, 2^31530650 is an apocalyptic number.

31530650 is a deficient number, since it is larger than the sum of its proper divisors (27116452).

31530650 is a wasteful number, since it uses less digits than its factorization.

31530650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630625 (or 630620 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 23.

The square root of 31530650 is about 5615.2159352958. The cubic root of 31530650 is about 315.9203786473.

The spelling of 31530650 in words is "thirty-one million, five hundred thirty thousand, six hundred fifty".