15204740731 has 2 divisors, whose sum is σ = 15204740732. Its totient is φ = 15204740730.

The previous prime is 15204740723. The next prime is 15204740741. The reversal of 15204740731 is 13704740251.

It is a weak prime.

It is an emirp because it is prime and its reverse (13704740251) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15204740731 - 2³ = 15204740723 is a prime.

It is a super-2 number, since 2×15204740731² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15204740711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7602370365 + 7602370366.

It is an arithmetic number, because the mean of its divisors is an integer number (7602370366).

Almost surely, 2^15204740731 is an apocalyptic number.

15204740731 is a deficient number, since it is larger than the sum of its proper divisors (1).

15204740731 is an equidigital number, since it uses as much as digits as its factorization.

15204740731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23520, while the sum is 34.

The spelling of 15204740731 in words is "fifteen billion, two hundred four million, seven hundred forty thousand, seven hundred thirty-one".