15320497 has 6 divisors (see below), whose sum is σ = 15867878. Its totient is φ = 14791392.

The previous prime is 15320491. The next prime is 15320509. The reversal of 15320497 is 79402351.

It can be written as a sum of positive squares in 3 ways, for example, as 1115136 + 14205361 = 1056^2 + 3769^2 .

It is not a de Polignac number, because 15320497 - 2³ = 15320489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15320491) 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 in 5 ways as a sum of consecutive naturals, for example, 8268 + ... + 9949.

Almost surely, 2^15320497 is an apocalyptic number.

It is an amenable number.

15320497 is a deficient number, since it is larger than the sum of its proper divisors (547381).

15320497 is an equidigital number, since it uses as much as digits as its factorization.

15320497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18275 (or 18246 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 15320497 is about 3914.1406464255. The cubic root of 15320497 is about 248.3653185633.

The spelling of 15320497 in words is "fifteen million, three hundred twenty thousand, four hundred ninety-seven".