23181056 has 72 divisors (see below), whose sum is σ = 50233344. Its totient is φ = 10644480.

The previous prime is 23181023. The next prime is 23181071. The reversal of 23181056 is 65018132.

It is a super-2 number, since 2×23181056² = 1074722714550272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182465 + ... + 182591.

Almost surely, 2^23181056 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 23181056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25116672).

23181056 is an abundant number, since it is smaller than the sum of its proper divisors (27052288).

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

23181056 is a wasteful number, since it uses less digits than its factorization.

23181056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 23181056 is about 4814.6709129493. The cubic root of 23181056 is about 285.1309790901.

Adding to 23181056 its reverse (65018132), we get a palindrome (88199188).

The spelling of 23181056 in words is "twenty-three million, one hundred eighty-one thousand, fifty-six".