22102210 has 64 divisors (see below), whose sum is σ = 46321632. Its totient is φ = 7520256.

The previous prime is 22102169. The next prime is 22102211. The reversal of 22102210 is 1220122.

It can be written as a sum of positive squares in 16 ways, for example, as 2627641 + 19474569 = 1621^2 + 4413^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (22102211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 161262 + ... + 161398.

Almost surely, 2^22102210 is an apocalyptic number.

22102210 is an abundant number, since it is smaller than the sum of its proper divisors (24219422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22102210 is a wasteful number, since it uses less digits than its factorization.

22102210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 22102210 is about 4701.2987567267. The cubic root of 22102210 is about 280.6371967887.

Adding to 22102210 its reverse (1220122), we get a palindrome (23322332).

The spelling of 22102210 in words is "twenty-two million, one hundred two thousand, two hundred ten".