15312097 has 2 divisors, whose sum is σ = 15312098. Its totient is φ = 15312096.

The previous prime is 15312091. The next prime is 15312107. The reversal of 15312097 is 79021351.

15312097 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12952801 + 2359296 = 3599^2 + 1536^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15312097 is a prime.

It is not a weakly prime, because it can be changed into another prime (15312091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7656048 + 7656049.

It is an arithmetic number, because the mean of its divisors is an integer number (7656049).

Almost surely, 2^15312097 is an apocalyptic number.

It is an amenable number.

15312097 is a deficient number, since it is larger than the sum of its proper divisors (1).

15312097 is an equidigital number, since it uses as much as digits as its factorization.

15312097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 15312097 is about 3913.0674668347. The cubic root of 15312097 is about 248.3199185983.

The spelling of 15312097 in words is "fifteen million, three hundred twelve thousand, ninety-seven".