22031120 has 20 divisors (see below), whose sum is σ = 51222540. Its totient is φ = 8812416.

The previous prime is 22031077. The next prime is 22031123. The reversal of 22031120 is 2113022.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14258176 + 7772944 = 3776^2 + 2788^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (22031123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137615 + ... + 137774.

It is an arithmetic number, because the mean of its divisors is an integer number (2561127).

Almost surely, 2^22031120 is an apocalyptic number.

22031120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22031120 is an abundant number, since it is smaller than the sum of its proper divisors (29191420).

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

22031120 is a wasteful number, since it uses less digits than its factorization.

22031120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275402 (or 275396 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 22031120 is about 4693.7319906445. The cubic root of 22031120 is about 280.3359912176.

Adding to 22031120 its reverse (2113022), we get a palindrome (24144142).

The spelling of 22031120 in words is "twenty-two million, thirty-one thousand, one hundred twenty".