23221332 has 18 divisors (see below), whose sum is σ = 58698458. Its totient is φ = 7740432.

The previous prime is 23221327. The next prime is 23221349. The reversal of 23221332 is 23312232.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12489156 + 10732176 = 3534^2 + 3276^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 322483 + ... + 322554.

Almost surely, 2^23221332 is an apocalyptic number.

It is an amenable number.

23221332 is an abundant number, since it is smaller than the sum of its proper divisors (35477126).

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

23221332 is a wasteful number, since it uses less digits than its factorization.

23221332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645047 (or 645042 counting only the distinct ones).

The product of its digits is 432, while the sum is 18.

The square root of 23221332 is about 4818.8517304437. The cubic root of 23221332 is about 285.2960174558.

Adding to 23221332 its reverse (23312232), we get a palindrome (46533564).

The spelling of 23221332 in words is "twenty-three million, two hundred twenty-one thousand, three hundred thirty-two".