15115321243 has 8 divisors (see below), whose sum is σ = 16573146480. Its totient is φ = 13671446880.

The previous prime is 15115321223. The next prime is 15115321253. The reversal of 15115321243 is 34212351151.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15115321243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15115321223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3485448 + ... + 3489781.

It is an arithmetic number, because the mean of its divisors is an integer number (2071643310).

Almost surely, 2^15115321243 is an apocalyptic number.

15115321243 is a deficient number, since it is larger than the sum of its proper divisors (1457825237).

15115321243 is a wasteful number, since it uses less digits than its factorization.

15115321243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6975437.

The product of its digits is 3600, while the sum is 28.

Adding to 15115321243 its reverse (34212351151), we get a palindrome (49327672394).

The spelling of 15115321243 in words is "fifteen billion, one hundred fifteen million, three hundred twenty-one thousand, two hundred forty-three".