31328323 has 16 divisors (see below), whose sum is σ = 36429120. Its totient is φ = 26699904.

The previous prime is 31328309. The next prime is 31328333. The reversal of 31328323 is 32382313.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 31328323 - 2⁹ = 31327811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31328333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6865 + ... + 10477.

It is an arithmetic number, because the mean of its divisors is an integer number (2276820).

Almost surely, 2^31328323 is an apocalyptic number.

31328323 is a deficient number, since it is larger than the sum of its proper divisors (5100797).

31328323 is a wasteful number, since it uses less digits than its factorization.

31328323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3678.

The product of its digits is 2592, while the sum is 25.

The square root of 31328323 is about 5597.1709818443. The cubic root of 31328323 is about 315.2431917233.

The spelling of 31328323 in words is "thirty-one million, three hundred twenty-eight thousand, three hundred twenty-three".