22231040 has 96 divisors (see below), whose sum is σ = 57788640. Its totient is φ = 8159232.

The previous prime is 22231037. The next prime is 22231049. The reversal of 22231040 is 4013222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22231049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133037 + ... + 133203.

It is an arithmetic number, because the mean of its divisors is an integer number (601965).

Almost surely, 2^22231040 is an apocalyptic number.

22231040 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 22231040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28894320).

22231040 is an abundant number, since it is smaller than the sum of its proper divisors (35557600).

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

22231040 is a wasteful number, since it uses less digits than its factorization.

22231040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 22231040 is about 4714.9803817195. The cubic root of 22231040 is about 281.1814028589.

Adding to 22231040 its reverse (4013222), we get a palindrome (26244262).

The spelling of 22231040 in words is "twenty-two million, two hundred thirty-one thousand, forty".