23211456 has 56 divisors (see below), whose sum is σ = 62599824. Its totient is φ = 7587840.

The previous prime is 23211451. The next prime is 23211457. The reversal of 23211456 is 65411232.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23211451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9036 + ... + 11316.

It is an arithmetic number, because the mean of its divisors is an integer number (1117854).

Almost surely, 2^23211456 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 23211456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31299912).

23211456 is an abundant number, since it is smaller than the sum of its proper divisors (39388368).

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

23211456 is a wasteful number, since it uses less digits than its factorization.

23211456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2349 (or 2339 counting only the distinct ones).

The product of its digits is 1440, while the sum is 24.

The square root of 23211456 is about 4817.8268960186. The cubic root of 23211456 is about 285.2555663884.

Adding to 23211456 its reverse (65411232), we get a palindrome (88622688).

The spelling of 23211456 in words is "twenty-three million, two hundred eleven thousand, four hundred fifty-six".