15530231447 has 2 divisors, whose sum is σ = 15530231448. Its totient is φ = 15530231446.

The previous prime is 15530231429. The next prime is 15530231491. The reversal of 15530231447 is 74413203551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15530231447 - 2²⁰ = 15529182871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15530231407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7765115723 + 7765115724.

It is an arithmetic number, because the mean of its divisors is an integer number (7765115724).

Almost surely, 2^15530231447 is an apocalyptic number.

15530231447 is a deficient number, since it is larger than the sum of its proper divisors (1).

15530231447 is an equidigital number, since it uses as much as digits as its factorization.

15530231447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 35.

Adding to 15530231447 its reverse (74413203551), we get a palindrome (89943434998).

The spelling of 15530231447 in words is "fifteen billion, five hundred thirty million, two hundred thirty-one thousand, four hundred forty-seven".