22218770 has 16 divisors (see below), whose sum is σ = 45707328. Its totient is φ = 7617840.

The previous prime is 22218767. The next prime is 22218799. The reversal of 22218770 is 7781222.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158636 + ... + 158775.

It is an arithmetic number, because the mean of its divisors is an integer number (2856708).

Almost surely, 2^22218770 is an apocalyptic number.

22218770 is an abundant number, since it is smaller than the sum of its proper divisors (23488558).

22218770 is a wasteful number, since it uses less digits than its factorization.

22218770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317425.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 22218770 is about 4713.6790302268. The cubic root of 22218770 is about 281.1296624283.

Adding to 22218770 its reverse (7781222), we get a palindrome (29999992).

The spelling of 22218770 in words is "twenty-two million, two hundred eighteen thousand, seven hundred seventy".