23213212 has 24 divisors (see below), whose sum is σ = 46650240. Its totient is φ = 9995760.

The previous prime is 23213209. The next prime is 23213219. The reversal of 23213212 is 21231232.

It is a super-2 number, since 2×23213212² = 1077706422713888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23213219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13048 + ... + 14719.

It is an arithmetic number, because the mean of its divisors is an integer number (1943760).

Almost surely, 2^23213212 is an apocalyptic number.

23213212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

23213212 is an abundant number, since it is smaller than the sum of its proper divisors (23437028).

23213212 is a wasteful number, since it uses less digits than its factorization.

23213212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27801 (or 27799 counting only the distinct ones).

The product of its digits is 144, while the sum is 16.

The square root of 23213212 is about 4818.0091324114. The cubic root of 23213212 is about 285.2627596201.

Adding to 23213212 its reverse (21231232), we get a palindrome (44444444).

The spelling of 23213212 in words is "twenty-three million, two hundred thirteen thousand, two hundred twelve".