31364731 has 2 divisors, whose sum is σ = 31364732. Its totient is φ = 31364730.

The previous prime is 31364719. The next prime is 31364741. The reversal of 31364731 is 13746313.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31364731 - 2⁷ = 31364603 is a prime.

It is a super-2 number, since 2×31364731² = 1967492701404722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31364731.

It is not a weakly prime, because it can be changed into another prime (31364701) 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 as a sum of consecutive naturals, namely, 15682365 + 15682366.

It is an arithmetic number, because the mean of its divisors is an integer number (15682366).

Almost surely, 2^31364731 is an apocalyptic number.

31364731 is a deficient number, since it is larger than the sum of its proper divisors (1).

31364731 is an equidigital number, since it uses as much as digits as its factorization.

31364731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 28.

The square root of 31364731 is about 5600.4223947842. The cubic root of 31364731 is about 315.3652636992.

The spelling of 31364731 in words is "thirty-one million, three hundred sixty-four thousand, seven hundred thirty-one".