23212056 has 64 divisors (see below), whose sum is σ = 68474880. Its totient is φ = 6416640.

The previous prime is 23212051. The next prime is 23212067. The reversal of 23212056 is 65021232.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23212051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2980 + ... + 7436.

It is an arithmetic number, because the mean of its divisors is an integer number (1069920).

Almost surely, 2^23212056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23212056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34237440).

23212056 is an abundant number, since it is smaller than the sum of its proper divisors (45262824).

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

23212056 is a wasteful number, since it uses less digits than its factorization.

23212056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4504 (or 4500 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 23212056 is about 4817.8891643540. The cubic root of 23212056 is about 285.2580242532.

Adding to 23212056 its reverse (65021232), we get a palindrome (88233288).

The spelling of 23212056 in words is "twenty-three million, two hundred twelve thousand, fifty-six".