22201213 has 8 divisors (see below), whose sum is σ = 22894200. Its totient is φ = 21515520.

The previous prime is 22201199. The next prime is 22201217. The reversal of 22201213 is 31210222.

It can be written as a sum of positive squares in 4 ways, for example, as 2647129 + 19554084 = 1627^2 + 4422^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22201213 - 2⁵ = 22201181 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22201193 and 22201202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22201217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4713 + ... + 8161.

It is an arithmetic number, because the mean of its divisors is an integer number (2861775).

Almost surely, 2^22201213 is an apocalyptic number.

It is an amenable number.

22201213 is a deficient number, since it is larger than the sum of its proper divisors (692987).

22201213 is a wasteful number, since it uses less digits than its factorization.

22201213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3647.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 22201213 is about 4711.8163164538. The cubic root of 22201213 is about 281.0555945101.

Adding to 22201213 its reverse (31210222), we get a palindrome (53411435).

Subtracting 22201213 from its reverse (31210222), we obtain a palindrome (9009009).

The spelling of 22201213 in words is "twenty-two million, two hundred one thousand, two hundred thirteen".