16231967571 has 4 divisors (see below), whose sum is σ = 21642623432. Its totient is φ = 10821311712.

The previous prime is 16231967509. The next prime is 16231967573. The reversal of 16231967571 is 17576913261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17576913261 = 3 ⋅5858971087.

It is not a de Polignac number, because 16231967571 - 2¹⁰ = 16231966547 is a prime.

It is a super-3 number, since 3×16231967571³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16231967571.

It is not an unprimeable number, because it can be changed into a prime (16231967573) 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, 2705327926 + ... + 2705327931.

It is an arithmetic number, because the mean of its divisors is an integer number (5410655858).

Almost surely, 2^16231967571 is an apocalyptic number.

16231967571 is a deficient number, since it is larger than the sum of its proper divisors (5410655861).

16231967571 is an equidigital number, since it uses as much as digits as its factorization.

16231967571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5410655860.

The product of its digits is 476280, while the sum is 48.

The spelling of 16231967571 in words is "sixteen billion, two hundred thirty-one million, nine hundred sixty-seven thousand, five hundred seventy-one".