15315479 has 2 divisors, whose sum is σ = 15315480. Its totient is φ = 15315478.

The previous prime is 15315431. The next prime is 15315491. The reversal of 15315479 is 97451351.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15315479 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15315499) 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, 7657739 + 7657740.

It is an arithmetic number, because the mean of its divisors is an integer number (7657740).

Almost surely, 2^15315479 is an apocalyptic number.

15315479 is a deficient number, since it is larger than the sum of its proper divisors (1).

15315479 is an equidigital number, since it uses as much as digits as its factorization.

15315479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18900, while the sum is 35.

The square root of 15315479 is about 3913.4995847706. The cubic root of 15315479 is about 248.3381994852.

The spelling of 15315479 in words is "fifteen million, three hundred fifteen thousand, four hundred seventy-nine".