22742213 has 8 divisors (see below), whose sum is σ = 24610656. Its totient is φ = 20890800.

The previous prime is 22742197. The next prime is 22742273. The reversal of 22742213 is 31224722.

It is a happy number.

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 22742213 - 2⁴ = 22742197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22742273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1403 + ... + 6888.

It is an arithmetic number, because the mean of its divisors is an integer number (3076332).

Almost surely, 2^22742213 is an apocalyptic number.

It is an amenable number.

22742213 is a deficient number, since it is larger than the sum of its proper divisors (1868443).

22742213 is a wasteful number, since it uses less digits than its factorization.

22742213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8515.

The product of its digits is 1344, while the sum is 23.

The square root of 22742213 is about 4768.8796378185. The cubic root of 22742213 is about 283.3202225383.

Adding to 22742213 its reverse (31224722), we get a palindrome (53966935).

The spelling of 22742213 in words is "twenty-two million, seven hundred forty-two thousand, two hundred thirteen".