22271620 has 48 divisors (see below), whose sum is σ = 53746560. Its totient is φ = 7593984.

The previous prime is 22271617. The next prime is 22271633. The reversal of 22271620 is 2617222.

It is a junction number, because it is equal to n+sod(n) for n = 22271591 and 22271600.

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, 35671 + ... + 36289.

It is an arithmetic number, because the mean of its divisors is an integer number (1119720).

Almost surely, 2^22271620 is an apocalyptic number.

22271620 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 22271620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26873280).

22271620 is an abundant number, since it is smaller than the sum of its proper divisors (31474940).

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

22271620 is a wasteful number, since it uses less digits than its factorization.

22271620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892 (or 890 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 22271620 is about 4719.2817250086. The cubic root of 22271620 is about 281.3523860974.

Adding to 22271620 its reverse (2617222), we get a palindrome (24888842).

The spelling of 22271620 in words is "twenty-two million, two hundred seventy-one thousand, six hundred twenty".