22143821465 has 4 divisors (see below), whose sum is σ = 26572585764. Its totient is φ = 17715057168.

The previous prime is 22143821369. The next prime is 22143821467. The reversal of 22143821465 is 56412834122.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8652534361 + 13491287104 = 93019^2 + 116152^2 .

It is a cyclic number.

It is not a de Polignac number, because 22143821465 - 2¹⁶ = 22143755929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22143821467) 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, 2214382142 + ... + 2214382151.

It is an arithmetic number, because the mean of its divisors is an integer number (6643146441).

Almost surely, 2^22143821465 is an apocalyptic number.

It is an amenable number.

22143821465 is a deficient number, since it is larger than the sum of its proper divisors (4428764299).

22143821465 is an equidigital number, since it uses as much as digits as its factorization.

22143821465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4428764298.

The product of its digits is 92160, while the sum is 38.

The spelling of 22143821465 in words is "twenty-two billion, one hundred forty-three million, eight hundred twenty-one thousand, four hundred sixty-five".