22820213 has 4 divisors (see below), whose sum is σ = 24575628. Its totient is φ = 21064800.

The previous prime is 22820183. The next prime is 22820261. The reversal of 22820213 is 31202822.

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 3301489 + 19518724 = 1817^2 + 4418^2 .

It is a cyclic number.

It is not a de Polignac number, because 22820213 - 2¹⁰ = 22819189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22820113) 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, 877688 + ... + 877713.

It is an arithmetic number, because the mean of its divisors is an integer number (6143907).

Almost surely, 2^22820213 is an apocalyptic number.

It is an amenable number.

22820213 is a deficient number, since it is larger than the sum of its proper divisors (1755415).

22820213 is a wasteful number, since it uses less digits than its factorization.

22820213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1755414.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 22820213 is about 4777.0506591411. The cubic root of 22820213 is about 283.6437583461.

The spelling of 22820213 in words is "twenty-two million, eight hundred twenty thousand, two hundred thirteen".