13721382571 has 4 divisors (see below), whose sum is σ = 14776873552. Its totient is φ = 12665891592.

The previous prime is 13721382503. The next prime is 13721382581. The reversal of 13721382571 is 17528312731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17528312731 = 661 ⋅26517871.

It is a cyclic number.

It is not a de Polignac number, because 13721382571 - 2⁷ = 13721382443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13721382581) 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, 527745471 + ... + 527745496.

It is an arithmetic number, because the mean of its divisors is an integer number (3694218388).

Almost surely, 2^13721382571 is an apocalyptic number.

13721382571 is a deficient number, since it is larger than the sum of its proper divisors (1055490981).

13721382571 is a wasteful number, since it uses less digits than its factorization.

13721382571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055490980.

The product of its digits is 70560, while the sum is 40.

The spelling of 13721382571 in words is "thirteen billion, seven hundred twenty-one million, three hundred eighty-two thousand, five hundred seventy-one".