23232581 has 4 divisors (see below), whose sum is σ = 23299500. Its totient is φ = 23165664.

The previous prime is 23232551. The next prime is 23232619. The reversal of 23232581 is 18523232.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7756225 + 15476356 = 2785^2 + 3934^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23232581 is a prime.

It is a super-2 number, since 2×23232581² = 1079505639843122, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23232581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23232541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32936 + ... + 33633.

It is an arithmetic number, because the mean of its divisors is an integer number (5824875).

Almost surely, 2^23232581 is an apocalyptic number.

It is an amenable number.

23232581 is a deficient number, since it is larger than the sum of its proper divisors (66919).

23232581 is an equidigital number, since it uses as much as digits as its factorization.

23232581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66918.

The product of its digits is 2880, while the sum is 26.

The square root of 23232581 is about 4820.0187758970. The cubic root of 23232581 is about 285.3420782189.

The spelling of 23232581 in words is "twenty-three million, two hundred thirty-two thousand, five hundred eighty-one".