22313220 has 144 divisors (see below), whose sum is σ = 70607040. Its totient is φ = 5246208.

The previous prime is 22313219. The next prime is 22313227. The reversal of 22313220 is 2231322.

It is a super-3 number, since 3×22313220³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 22313220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22313227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 603042 + ... + 603078.

Almost surely, 2^22313220 is an apocalyptic number.

22313220 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 22313220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35303520).

22313220 is an abundant number, since it is smaller than the sum of its proper divisors (48293820).

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

22313220 is a wasteful number, since it uses less digits than its factorization.

22313220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 22313220 is about 4723.6871191898. The cubic root of 22313220 is about 281.5274516375.

Adding to 22313220 its reverse (2231322), we get a palindrome (24544542).

The spelling of 22313220 in words is "twenty-two million, three hundred thirteen thousand, two hundred twenty".