22171648 has 26 divisors (see below), whose sum is σ = 44346074. Its totient is φ = 11083776.

The previous prime is 22171637. The next prime is 22171657. The reversal of 22171648 is 84617122.

It can be written as a sum of positive squares in only one way, i.e., 16257024 + 5914624 = 4032^2 + 2432^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1390 + ... + 6802.

Almost surely, 2^22171648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22171648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22173037).

22171648 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

22171648 is an frugal number, since it uses more digits than its factorization.

22171648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5437 (or 5415 counting only the distinct ones).

The product of its digits is 5376, while the sum is 31.

The square root of 22171648 is about 4708.6779460906. The cubic root of 22171648 is about 280.9307800103.

The spelling of 22171648 in words is "twenty-two million, one hundred seventy-one thousand, six hundred forty-eight".