22101040 has 80 divisors (see below), whose sum is σ = 56246400. Its totient is φ = 8027136.

The previous prime is 22101029. The next prime is 22101041. The reversal of 22101040 is 4010122.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22101041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82026 + ... + 82294.

It is an arithmetic number, because the mean of its divisors is an integer number (703080).

Almost surely, 2^22101040 is an apocalyptic number.

22101040 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 22101040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28123200).

22101040 is an abundant number, since it is smaller than the sum of its proper divisors (34145360).

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

22101040 is a wasteful number, since it uses less digits than its factorization.

22101040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374 (or 368 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 22101040 is about 4701.1743213797. The cubic root of 22101040 is about 280.6322447754.

Adding to 22101040 its reverse (4010122), we get a palindrome (26111162).

The spelling of 22101040 in words is "twenty-two million, one hundred one thousand, forty".