22135213 has 8 divisors (see below), whose sum is σ = 22825080. Its totient is φ = 21450240.

The previous prime is 22135193. The next prime is 22135219. The reversal of 22135213 is 31253122.

It can be written as a sum of positive squares in 4 ways, for example, as 6666724 + 15468489 = 2582^2 + 3933^2 .

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 22135213 - 2⁹ = 22134701 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 (22135219) 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, 9333 + ... + 11461.

It is an arithmetic number, because the mean of its divisors is an integer number (2853135).

Almost surely, 2^22135213 is an apocalyptic number.

It is an amenable number.

22135213 is a deficient number, since it is larger than the sum of its proper divisors (689867).

22135213 is a wasteful number, since it uses less digits than its factorization.

22135213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2447.

The product of its digits is 360, while the sum is 19.

The square root of 22135213 is about 4704.8074349542. The cubic root of 22135213 is about 280.7768097246.

Adding to 22135213 its reverse (31253122), we get a palindrome (53388335).

The spelling of 22135213 in words is "twenty-two million, one hundred thirty-five thousand, two hundred thirteen".