22785213 has 24 divisors (see below), whose sum is σ = 34366176. Its totient is φ = 13316800.

The previous prime is 22785211. The next prime is 22785241. The reversal of 22785213 is 31258722.

It is not a de Polignac number, because 22785213 - 2¹ = 22785211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22785211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27343 + ... + 28163.

It is an arithmetic number, because the mean of its divisors is an integer number (1431924).

Almost surely, 2^22785213 is an apocalyptic number.

It is an amenable number.

22785213 is a deficient number, since it is larger than the sum of its proper divisors (11580963).

22785213 is a wasteful number, since it uses less digits than its factorization.

22785213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893 (or 864 counting only the distinct ones).

The product of its digits is 6720, while the sum is 30.

The square root of 22785213 is about 4773.3859052040. The cubic root of 22785213 is about 283.4986733543.

The spelling of 22785213 in words is "twenty-two million, seven hundred eighty-five thousand, two hundred thirteen".