22331664 has 30 divisors (see below), whose sum is σ = 62498046. Its totient is φ = 7443840.

The previous prime is 22331651. The next prime is 22331671. The reversal of 22331664 is 46613322.

It can be written as a sum of positive squares in only one way, i.e., 14379264 + 7952400 = 3792^2 + 2820^2 .

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

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, 77397 + ... + 77684.

Almost surely, 2^22331664 is an apocalyptic number.

22331664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

22331664 is an abundant number, since it is smaller than the sum of its proper divisors (40166382).

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

22331664 is a wasteful number, since it uses less digits than its factorization.

22331664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155095 (or 155086 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 22331664 is about 4725.6390044099. The cubic root of 22331664 is about 281.6050000188.

Adding to 22331664 its reverse (46613322), we get a palindrome (68944986).

The spelling of 22331664 in words is "twenty-two million, three hundred thirty-one thousand, six hundred sixty-four".