23152181 has 8 divisors (see below), whose sum is σ = 26400024. Its totient is φ = 20113920.

The previous prime is 23152163. The next prime is 23152183. The reversal of 23152181 is 18125132.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 504100 + 22648081 = 710^2 + 4759^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23152181 - 2⁶ = 23152117 is a prime.

It is a super-2 number, since 2×23152181² = 1072046970113522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23152183) 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, 52160 + ... + 52601.

It is an arithmetic number, because the mean of its divisors is an integer number (3300003).

Almost surely, 2^23152181 is an apocalyptic number.

It is an amenable number.

23152181 is a deficient number, since it is larger than the sum of its proper divisors (3247843).

23152181 is a wasteful number, since it uses less digits than its factorization.

23152181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104791.

The product of its digits is 480, while the sum is 23.

The square root of 23152181 is about 4811.6713312528. The cubic root of 23152181 is about 285.0125407429.

The spelling of 23152181 in words is "twenty-three million, one hundred fifty-two thousand, one hundred eighty-one".