22218264 has 24 divisors (see below), whose sum is σ = 60174660. Its totient is φ = 7406064.

The previous prime is 22218257. The next prime is 22218271. The reversal of 22218264 is 46281222.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22218257) and next prime (22218271).

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 154222 + ... + 154365.

Almost surely, 2^22218264 is an apocalyptic number.

22218264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22218264 is an abundant number, since it is smaller than the sum of its proper divisors (37956396).

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

22218264 is a wasteful number, since it uses less digits than its factorization.

22218264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308599 (or 308592 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 22218264 is about 4713.6253563473. The cubic root of 22218264 is about 281.1275283065.

Adding to 22218264 its reverse (46281222), we get a palindrome (68499486).

The spelling of 22218264 in words is "twenty-two million, two hundred eighteen thousand, two hundred sixty-four".