15242312321 has 2 divisors, whose sum is σ = 15242312322. Its totient is φ = 15242312320.

The previous prime is 15242312303. The next prime is 15242312339. The reversal of 15242312321 is 12321324251.

It is a balanced prime because it is at equal distance from previous prime (15242312303) and next prime (15242312339).

It can be written as a sum of positive squares in only one way, i.e., 7976454721 + 7265857600 = 89311^2 + 85240^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15242312321 is a prime.

It is not a weakly prime, because it can be changed into another prime (15242312381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7621156160 + 7621156161.

It is an arithmetic number, because the mean of its divisors is an integer number (7621156161).

Almost surely, 2^15242312321 is an apocalyptic number.

It is an amenable number.

15242312321 is a deficient number, since it is larger than the sum of its proper divisors (1).

15242312321 is an equidigital number, since it uses as much as digits as its factorization.

15242312321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 26.

Adding to 15242312321 its reverse (12321324251), we get a palindrome (27563636572).

The spelling of 15242312321 in words is "fifteen billion, two hundred forty-two million, three hundred twelve thousand, three hundred twenty-one".