22222140 has 48 divisors (see below), whose sum is σ = 64931328. Its totient is φ = 5667904.

The previous prime is 22222129. The next prime is 22222199. The reversal of 22222140 is 4122222.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6672 + ... + 9431.

It is an arithmetic number, because the mean of its divisors is an integer number (1352736).

Almost surely, 2^22222140 is an apocalyptic number.

22222140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22222140 is an abundant number, since it is smaller than the sum of its proper divisors (42709188).

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

22222140 is a wasteful number, since it uses less digits than its factorization.

22222140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16138 (or 16136 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 22222140 is about 4714.0364869186. The cubic root of 22222140 is about 281.1438750223.

Adding to 22222140 its reverse (4122222), we get a palindrome (26344362).

The spelling of 22222140 in words is "twenty-two million, two hundred twenty-two thousand, one hundred forty".