15601240243 has 2 divisors, whose sum is σ = 15601240244. Its totient is φ = 15601240242.

The previous prime is 15601240231. The next prime is 15601240283. The reversal of 15601240243 is 34204210651.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15601240243 is a prime.

It is not a weakly prime, because it can be changed into another prime (15601240223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7800620121 + 7800620122.

It is an arithmetic number, because the mean of its divisors is an integer number (7800620122).

Almost surely, 2^15601240243 is an apocalyptic number.

15601240243 is a deficient number, since it is larger than the sum of its proper divisors (1).

15601240243 is an equidigital number, since it uses as much as digits as its factorization.

15601240243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 15601240243 its reverse (34204210651), we get a palindrome (49805450894).

The spelling of 15601240243 in words is "fifteen billion, six hundred one million, two hundred forty thousand, two hundred forty-three".