22541440 has 32 divisors (see below), whose sum is σ = 53889660. Its totient is φ = 9016320.

The previous prime is 22541423. The next prime is 22541443. The reversal of 22541440 is 4414522.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21752896 + 788544 = 4664^2 + 888^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (22541443) 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, 16971 + ... + 18250.

Almost surely, 2^22541440 is an apocalyptic number.

22541440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22541440 is an abundant number, since it is smaller than the sum of its proper divisors (31348220).

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

22541440 is an equidigital number, since it uses as much as digits as its factorization.

22541440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35240 (or 35228 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 22541440 is about 4747.7826403491. The cubic root of 22541440 is about 282.4840202933.

Adding to 22541440 its reverse (4414522), we get a palindrome (26955962).

The spelling of 22541440 in words is "twenty-two million, five hundred forty-one thousand, four hundred forty".