15715397171 has 2 divisors, whose sum is σ = 15715397172. Its totient is φ = 15715397170.

The previous prime is 15715397101. The next prime is 15715397213. The reversal of 15715397171 is 17179351751.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15715397171 - 2¹⁴ = 15715380787 is a prime.

It is not a weakly prime, because it can be changed into another prime (15715397101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7857698585 + 7857698586.

It is an arithmetic number, because the mean of its divisors is an integer number (7857698586).

Almost surely, 2^15715397171 is an apocalyptic number.

15715397171 is a deficient number, since it is larger than the sum of its proper divisors (1).

15715397171 is an equidigital number, since it uses as much as digits as its factorization.

15715397171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 231525, while the sum is 47.

The spelling of 15715397171 in words is "fifteen billion, seven hundred fifteen million, three hundred ninety-seven thousand, one hundred seventy-one".