22143140 has 12 divisors (see below), whose sum is σ = 46500636. Its totient is φ = 8857248.

The previous prime is 22143137. The next prime is 22143161. The reversal of 22143140 is 4134122.

It can be written as a sum of positive squares in 2 ways, for example, as 12208036 + 9935104 = 3494^2 + 3152^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 553559 + ... + 553598.

It is an arithmetic number, because the mean of its divisors is an integer number (3875053).

Almost surely, 2^22143140 is an apocalyptic number.

22143140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22143140 is an abundant number, since it is smaller than the sum of its proper divisors (24357496).

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

22143140 is a wasteful number, since it uses less digits than its factorization.

22143140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107166 (or 1107164 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 22143140 is about 4705.6497957243. The cubic root of 22143140 is about 280.8103227240.

Adding to 22143140 its reverse (4134122), we get a palindrome (26277262).

The spelling of 22143140 in words is "twenty-two million, one hundred forty-three thousand, one hundred forty".