31304323 has 2 divisors, whose sum is σ = 31304324. Its totient is φ = 31304322.

The previous prime is 31304321. The next prime is 31304333. The reversal of 31304323 is 32340313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31304323 - 2¹ = 31304321 is a prime.

Together with 31304321, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 31304323.

It is not a weakly prime, because it can be changed into another prime (31304321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15652161 + 15652162.

It is an arithmetic number, because the mean of its divisors is an integer number (15652162).

Almost surely, 2^31304323 is an apocalyptic number.

31304323 is a deficient number, since it is larger than the sum of its proper divisors (1).

31304323 is an equidigital number, since it uses as much as digits as its factorization.

31304323 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 31304323 is about 5595.0266308571. The cubic root of 31304323 is about 315.1626706621.

Adding to 31304323 its reverse (32340313), we get a palindrome (63644636).

The spelling of 31304323 in words is "thirty-one million, three hundred four thousand, three hundred twenty-three".