3218713818431 has 4 divisors (see below), whose sum is σ = 3305706083832. Its totient is φ = 3131721553032.

The previous prime is 3218713818373. The next prime is 3218713818443. The reversal of 3218713818431 is 1348183178123.

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 3218713818431 - 2¹⁴ = 3218713802047 is a prime.

It is a super-2 number, since 2×3218713818431² (a number of 26 digits) contains 22 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 3218713818431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3218713818461) 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, 43496132645 + ... + 43496132718.

It is an arithmetic number, because the mean of its divisors is an integer number (826426520958).

Almost surely, 2^{3218713818431} is an apocalyptic number.

3218713818431 is a deficient number, since it is larger than the sum of its proper divisors (86992265401).

3218713818431 is an equidigital number, since it uses as much as digits as its factorization.

3218713818431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86992265400.

The product of its digits is 774144, while the sum is 50.

The spelling of 3218713818431 in words is "three trillion, two hundred eighteen billion, seven hundred thirteen million, eight hundred eighteen thousand, four hundred thirty-one".