22065140 has 12 divisors (see below), whose sum is σ = 46336836. Its totient is φ = 8826048.

The previous prime is 22065089. The next prime is 22065157. The reversal of 22065140 is 4156022.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3020644 + 19044496 = 1738^2 + 4364^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1103257 = 22065140 / (2 + 2 + 0 + 6 + 5 + 1 + 4 + 0).

It is a congruent number.

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, 551609 + ... + 551648.

It is an arithmetic number, because the mean of its divisors is an integer number (3861403).

Almost surely, 2^22065140 is an apocalyptic number.

22065140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22065140 is an abundant number, since it is smaller than the sum of its proper divisors (24271696).

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

22065140 is a wasteful number, since it uses less digits than its factorization.

22065140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1103266 (or 1103264 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 22065140 is about 4697.3545746516. The cubic root of 22065140 is about 280.4802133553.

The spelling of 22065140 in words is "twenty-two million, sixty-five thousand, one hundred forty".