22501240 has 32 divisors (see below), whose sum is σ = 50964480. Its totient is φ = 8940672.

The previous prime is 22501231. The next prime is 22501261. The reversal of 22501240 is 4210522.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4489 + ... + 8071.

It is an arithmetic number, because the mean of its divisors is an integer number (1592640).

Almost surely, 2^22501240 is an apocalyptic number.

22501240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22501240 is an abundant number, since it is smaller than the sum of its proper divisors (28463240).

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

22501240 is a wasteful number, since it uses less digits than its factorization.

22501240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3751 (or 3747 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 22501240 is about 4743.5471959284. The cubic root of 22501240 is about 282.3159947232.

Adding to 22501240 its reverse (4210522), we get a palindrome (26711762).

The spelling of 22501240 in words is "twenty-two million, five hundred one thousand, two hundred forty".