15247931 has 2 divisors, whose sum is σ = 15247932. Its totient is φ = 15247930.

The previous prime is 15247913. The next prime is 15247933. The reversal of 15247931 is 13974251.

Together with previous prime (15247913) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15247931 - 2¹⁴ = 15231547 is a prime.

It is a super-2 number, since 2×15247931² = 464998799561522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 15247933, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15247933) 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, 7623965 + 7623966.

It is an arithmetic number, because the mean of its divisors is an integer number (7623966).

Almost surely, 2^15247931 is an apocalyptic number.

15247931 is a deficient number, since it is larger than the sum of its proper divisors (1).

15247931 is an equidigital number, since it uses as much as digits as its factorization.

15247931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 32.

The square root of 15247931 is about 3904.8599206630. The cubic root of 15247931 is about 247.9725678554.

The spelling of 15247931 in words is "fifteen million, two hundred forty-seven thousand, nine hundred thirty-one".