15713240581 has 2 divisors, whose sum is σ = 15713240582. Its totient is φ = 15713240580.

The previous prime is 15713240513. The next prime is 15713240591. The reversal of 15713240581 is 18504231751.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14798722500 + 914518081 = 121650^2 + 30241^2 .

It is an emirp because it is prime and its reverse (18504231751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15713240581 - 2⁹ = 15713240069 is a prime.

It is a super-2 number, since 2×15713240581² (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 15713240581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15713240591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7856620290 + 7856620291.

It is an arithmetic number, because the mean of its divisors is an integer number (7856620291).

Almost surely, 2^15713240581 is an apocalyptic number.

It is an amenable number.

15713240581 is a deficient number, since it is larger than the sum of its proper divisors (1).

15713240581 is an equidigital number, since it uses as much as digits as its factorization.

15713240581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33600, while the sum is 37.

The spelling of 15713240581 in words is "fifteen billion, seven hundred thirteen million, two hundred forty thousand, five hundred eighty-one".