15242731397 has 2 divisors, whose sum is σ = 15242731398. Its totient is φ = 15242731396.

The previous prime is 15242731337. The next prime is 15242731411. The reversal of 15242731397 is 79313724251.

15242731397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12758606116 + 2484125281 = 112954^2 + 49841^2 .

It is a cyclic number.

It is not a de Polignac number, because 15242731397 - 2⁶ = 15242731333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15242731337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7621365698 + 7621365699.

It is an arithmetic number, because the mean of its divisors is an integer number (7621365699).

Almost surely, 2^15242731397 is an apocalyptic number.

It is an amenable number.

15242731397 is a deficient number, since it is larger than the sum of its proper divisors (1).

15242731397 is an equidigital number, since it uses as much as digits as its factorization.

15242731397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 44.

The spelling of 15242731397 in words is "fifteen billion, two hundred forty-two million, seven hundred thirty-one thousand, three hundred ninety-seven".