22219540 has 96 divisors (see below), whose sum is σ = 56448000. Its totient is φ = 7338240.

The previous prime is 22219523. The next prime is 22219543. The reversal of 22219540 is 4591222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22219543) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 281221 + ... + 281299.

It is an arithmetic number, because the mean of its divisors is an integer number (588000).

Almost surely, 2^22219540 is an apocalyptic number.

22219540 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 22219540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28224000).

22219540 is an abundant number, since it is smaller than the sum of its proper divisors (34228460).

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

22219540 is a wasteful number, since it uses less digits than its factorization.

22219540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 22219540 is about 4713.7607066969. The cubic root of 22219540 is about 281.1329099429.

The spelling of 22219540 in words is "twenty-two million, two hundred nineteen thousand, five hundred forty".