15193871291 has 4 divisors (see below), whose sum is σ = 15195539712. Its totient is φ = 15192202872.

The previous prime is 15193871267. The next prime is 15193871321. The reversal of 15193871291 is 19217839151.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 15193871291 - 2¹⁰ = 15193870267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15193871201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 820475 + ... + 838788.

It is an arithmetic number, because the mean of its divisors is an integer number (3798884928).

Almost surely, 2^15193871291 is an apocalyptic number.

15193871291 is a deficient number, since it is larger than the sum of its proper divisors (1668421).

15193871291 is an equidigital number, since it uses as much as digits as its factorization.

15193871291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668420.

The product of its digits is 136080, while the sum is 47.

The spelling of 15193871291 in words is "fifteen billion, one hundred ninety-three million, eight hundred seventy-one thousand, two hundred ninety-one".