22531040 has 48 divisors (see below), whose sum is σ = 60836832. Its totient is φ = 7724544.

The previous prime is 22531009. The next prime is 22531049. The reversal of 22531040 is 4013522.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22531049) 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, 8939 + ... + 11178.

It is an arithmetic number, because the mean of its divisors is an integer number (1267434).

Almost surely, 2^22531040 is an apocalyptic number.

22531040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22531040 is an abundant number, since it is smaller than the sum of its proper divisors (38305792).

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

22531040 is a wasteful number, since it uses less digits than its factorization.

22531040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20139 (or 20131 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 22531040 is about 4746.6872658729. The cubic root of 22531040 is about 282.4405701597.

Adding to 22531040 its reverse (4013522), we get a palindrome (26544562).

The spelling of 22531040 in words is "twenty-two million, five hundred thirty-one thousand, forty".