22152542440 has 128 divisors (see below), whose sum is σ = 57967902720. Its totient is φ = 7462022400.

The previous prime is 22152542389. The next prime is 22152542479. The reversal of 22152542440 is 4424525122.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6180889 + ... + 6184471.

It is an arithmetic number, because the mean of its divisors is an integer number (452874240).

Almost surely, 2^22152542440 is an apocalyptic number.

22152542440 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 22152542440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28983951360).

22152542440 is an abundant number, since it is smaller than the sum of its proper divisors (35815360280).

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

22152542440 is a wasteful number, since it uses less digits than its factorization.

22152542440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3983 (or 3979 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 31.

The spelling of 22152542440 in words is "twenty-two billion, one hundred fifty-two million, five hundred forty-two thousand, four hundred forty".