22525304440 has 32 divisors (see below), whose sum is σ = 50687088480. Its totient is φ = 9009205632.

The previous prime is 22525304423. The next prime is 22525304447. The reversal of 22525304440 is 4440352522.

It is a super-2 number, since 2×22525304440² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22525304447) 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, 482197 + ... + 526843.

It is an arithmetic number, because the mean of its divisors is an integer number (1583971515).

Almost surely, 2^22525304440 is an apocalyptic number.

22525304440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22525304440 is an abundant number, since it is smaller than the sum of its proper divisors (28161784040).

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

22525304440 is a wasteful number, since it uses less digits than its factorization.

22525304440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57271 (or 57267 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 31.

Adding to 22525304440 its reverse (4440352522), we get a palindrome (26965656962).

The spelling of 22525304440 in words is "twenty-two billion, five hundred twenty-five million, three hundred four thousand, four hundred forty".