23205181 has 2 divisors, whose sum is σ = 23205182. Its totient is φ = 23205180.

The previous prime is 23205109. The next prime is 23205199. The reversal of 23205181 is 18150232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13439556 + 9765625 = 3666^2 + 3125^2 .

It is a cyclic number.

It is not a de Polignac number, because 23205181 - 2¹³ = 23196989 is a prime.

It is a super-2 number, since 2×23205181² = 1076960850485522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23205881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11602590 + 11602591.

It is an arithmetic number, because the mean of its divisors is an integer number (11602591).

Almost surely, 2^23205181 is an apocalyptic number.

It is an amenable number.

23205181 is a deficient number, since it is larger than the sum of its proper divisors (1).

23205181 is an equidigital number, since it uses as much as digits as its factorization.

23205181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 23205181 is about 4817.1756247826. The cubic root of 23205181 is about 285.2298586803.

The spelling of 23205181 in words is "twenty-three million, two hundred five thousand, one hundred eighty-one".