222824813 has 4 divisors (see below), whose sum is σ = 224796828. Its totient is φ = 220852800.

The previous prime is 222824801. The next prime is 222824821. The reversal of 222824813 is 318428222.

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 64995844 + 157828969 = 8062^2 + 12563^2 .

It is a cyclic number.

It is not a de Polignac number, because 222824813 - 2²² = 218630509 is a prime.

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 222824813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222824863) 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, 985838 + ... + 986063.

It is an arithmetic number, because the mean of its divisors is an integer number (56199207).

Almost surely, 2^222824813 is an apocalyptic number.

It is an amenable number.

222824813 is a deficient number, since it is larger than the sum of its proper divisors (1972015).

222824813 is a wasteful number, since it uses less digits than its factorization.

222824813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1972014.

The product of its digits is 12288, while the sum is 32.

The square root of 222824813 is about 14927.3176759926. The cubic root of 222824813 is about 606.2538602085.

The spelling of 222824813 in words is "two hundred twenty-two million, eight hundred twenty-four thousand, eight hundred thirteen".