31344931 has 2 divisors, whose sum is σ = 31344932. Its totient is φ = 31344930.

The previous prime is 31344913. The next prime is 31344977. The reversal of 31344931 is 13944313.

Together with previous prime (31344913) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31344931 - 2⁹ = 31344419 is a prime.

It is a super-2 number, since 2×31344931² = 1965009398789522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31344931.

It is not a weakly prime, because it can be changed into another prime (31344031) 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 as a sum of consecutive naturals, namely, 15672465 + 15672466.

It is an arithmetic number, because the mean of its divisors is an integer number (15672466).

Almost surely, 2^31344931 is an apocalyptic number.

31344931 is a deficient number, since it is larger than the sum of its proper divisors (1).

31344931 is an equidigital number, since it uses as much as digits as its factorization.

31344931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 28.

The square root of 31344931 is about 5598.6543919053. The cubic root of 31344931 is about 315.2988882254.

The spelling of 31344931 in words is "thirty-one million, three hundred forty-four thousand, nine hundred thirty-one".