15502397 has 2 divisors, whose sum is σ = 15502398. Its totient is φ = 15502396.

The previous prime is 15502379. The next prime is 15502411. The reversal of 15502397 is 79320551.

Together with previous prime (15502379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13388281 + 2114116 = 3659^2 + 1454^2 .

It is a cyclic number.

It is not a de Polignac number, because 15502397 - 2¹⁴ = 15486013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15502367) 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, 7751198 + 7751199.

It is an arithmetic number, because the mean of its divisors is an integer number (7751199).

Almost surely, 2^15502397 is an apocalyptic number.

It is an amenable number.

15502397 is a deficient number, since it is larger than the sum of its proper divisors (1).

15502397 is an equidigital number, since it uses as much as digits as its factorization.

15502397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9450, while the sum is 32.

The square root of 15502397 is about 3937.3083445420. The cubic root of 15502397 is about 249.3443995886.

The spelling of 15502397 in words is "fifteen million, five hundred two thousand, three hundred ninety-seven".