23280181 has 4 divisors (see below), whose sum is σ = 23775552. Its totient is φ = 22784812.

The previous prime is 23280167. The next prime is 23280193. The reversal of 23280181 is 18108232.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23280181 - 2⁷ = 23280053 is a prime.

It is a super-2 number, since 2×23280181² = 1083933654785522, 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 (23280121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247615 + ... + 247708.

It is an arithmetic number, because the mean of its divisors is an integer number (5943888).

Almost surely, 2^23280181 is an apocalyptic number.

It is an amenable number.

23280181 is a deficient number, since it is larger than the sum of its proper divisors (495371).

23280181 is an equidigital number, since it uses as much as digits as its factorization.

23280181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495370.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 23280181 is about 4824.9539894179. The cubic root of 23280181 is about 285.5368193523.

The spelling of 23280181 in words is "twenty-three million, two hundred eighty thousand, one hundred eighty-one".