22001232 has 40 divisors (see below), whose sum is σ = 62004960. Its totient is φ = 6666880.

The previous prime is 22001209. The next prime is 22001237. The reversal of 22001232 is 23210022.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22001237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20307 + ... + 21362.

It is an arithmetic number, because the mean of its divisors is an integer number (1550124).

Almost surely, 2^22001232 is an apocalyptic number.

22001232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

22001232 is an abundant number, since it is smaller than the sum of its proper divisors (40003728).

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

22001232 is a wasteful number, since it uses less digits than its factorization.

22001232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41691 (or 41685 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 22001232 is about 4690.5470896261. The cubic root of 22001232 is about 280.2091634413.

Adding to 22001232 its reverse (23210022), we get a palindrome (45211254).

The spelling of 22001232 in words is "twenty-two million, one thousand, two hundred thirty-two".