22142700 has 144 divisors (see below), whose sum is σ = 72912000. Its totient is φ = 5762880.

The previous prime is 22142693. The next prime is 22142707. The reversal of 22142700 is 724122.

It is an interprime number because it is at equal distance from previous prime (22142693) and next prime (22142707).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (22142707) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 159231 + ... + 159369.

Almost surely, 2^22142700 is an apocalyptic number.

22142700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22142700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36456000).

22142700 is an abundant number, since it is smaller than the sum of its proper divisors (50769300).

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

22142700 is a wasteful number, since it uses less digits than its factorization.

22142700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 22142700 is about 4705.6030431816. The cubic root of 22142700 is about 280.8084627444.

Adding to 22142700 its reverse (724122), we get a palindrome (22866822).

The spelling of 22142700 in words is "twenty-two million, one hundred forty-two thousand, seven hundred".