31299966 has 16 divisors (see below), whose sum is σ = 69555600. Its totient is φ = 10433304.

The previous prime is 31299953. The next prime is 31299967. The reversal of 31299966 is 66999213.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31299967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 289761 + ... + 289868.

It is an arithmetic number, because the mean of its divisors is an integer number (4347225).

Almost surely, 2^31299966 is an apocalyptic number.

31299966 is an abundant number, since it is smaller than the sum of its proper divisors (38255634).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31299966 is a wasteful number, since it uses less digits than its factorization.

31299966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579640 (or 579634 counting only the distinct ones).

The product of its digits is 157464, while the sum is 45.

The square root of 31299966 is about 5594.6372536564. The cubic root of 31299966 is about 315.1480483210.

The spelling of 31299966 in words is "thirty-one million, two hundred ninety-nine thousand, nine hundred sixty-six".