15303242231 has 2 divisors, whose sum is σ = 15303242232. Its totient is φ = 15303242230.

The previous prime is 15303242191. The next prime is 15303242239. The reversal of 15303242231 is 13224230351.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15303242231 is a prime.

It is a super-2 number, since 2×15303242231² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 15303242231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15303242239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7651621115 + 7651621116.

It is an arithmetic number, because the mean of its divisors is an integer number (7651621116).

Almost surely, 2^15303242231 is an apocalyptic number.

15303242231 is a deficient number, since it is larger than the sum of its proper divisors (1).

15303242231 is an equidigital number, since it uses as much as digits as its factorization.

15303242231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 15303242231 its reverse (13224230351), we get a palindrome (28527472582).

The spelling of 15303242231 in words is "fifteen billion, three hundred three million, two hundred forty-two thousand, two hundred thirty-one".