15241321993 has 2 divisors, whose sum is σ = 15241321994. Its totient is φ = 15241321992.

The previous prime is 15241321981. The next prime is 15241322027. The reversal of 15241321993 is 39912314251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10611472144 + 4629849849 = 103012^2 + 68043^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15241321993 is a prime.

It is not a weakly prime, because it can be changed into another prime (15241321093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7620660996 + 7620660997.

It is an arithmetic number, because the mean of its divisors is an integer number (7620660997).

Almost surely, 2^15241321993 is an apocalyptic number.

It is an amenable number.

15241321993 is a deficient number, since it is larger than the sum of its proper divisors (1).

15241321993 is an equidigital number, since it uses as much as digits as its factorization.

15241321993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 40.

The spelling of 15241321993 in words is "fifteen billion, two hundred forty-one million, three hundred twenty-one thousand, nine hundred ninety-three".