22321240 has 64 divisors (see below), whose sum is σ = 53084160. Its totient is φ = 8434560.

The previous prime is 22321237. The next prime is 22321253. The reversal of 22321240 is 4212322.

It is a super-3 number, since 3×22321240³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58089 + ... + 58471.

It is an arithmetic number, because the mean of its divisors is an integer number (829440).

Almost surely, 2^22321240 is an apocalyptic number.

22321240 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 22321240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26542080).

22321240 is an abundant number, since it is smaller than the sum of its proper divisors (30762920).

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

22321240 is a wasteful number, since it uses less digits than its factorization.

22321240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472 (or 468 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 22321240 is about 4724.5359560490. The cubic root of 22321240 is about 281.5611772302.

Adding to 22321240 its reverse (4212322), we get a palindrome (26533562).

The spelling of 22321240 in words is "twenty-two million, three hundred twenty-one thousand, two hundred forty".