22215648 has 96 divisors (see below), whose sum is σ = 71801856. Its totient is φ = 5856768.

The previous prime is 22215629. The next prime is 22215667. The reversal of 22215648 is 84651222.

It is an interprime number because it is at equal distance from previous prime (22215629) and next prime (22215667).

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-3 number, since 3×22215648³ (a number of 23 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

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, 7465 + ... + 10007.

It is an arithmetic number, because the mean of its divisors is an integer number (747936).

Almost surely, 2^22215648 is an apocalyptic number.

22215648 is a gapful number since it is divisible by the number (28) 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 22215648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35900928).

22215648 is an abundant number, since it is smaller than the sum of its proper divisors (49586208).

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

22215648 is a wasteful number, since it uses less digits than its factorization.

22215648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2576 (or 2568 counting only the distinct ones).

The product of its digits is 7680, while the sum is 30.

The square root of 22215648 is about 4713.3478547631. The cubic root of 22215648 is about 281.1164944639.

The spelling of 22215648 in words is "twenty-two million, two hundred fifteen thousand, six hundred forty-eight".