23181241 has 2 divisors, whose sum is σ = 23181242. Its totient is φ = 23181240.

The previous prime is 23181239. The next prime is 23181253. The reversal of 23181241 is 14218132.

23181241 = 3404² + 3405².

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11594025 + 11587216 = 3405^2 + 3404^2 .

It is a cyclic number.

It is not a de Polignac number, because 23181241 - 2¹ = 23181239 is a prime.

Together with 23181239, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23181341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11590620 + 11590621.

It is an arithmetic number, because the mean of its divisors is an integer number (11590621).

Almost surely, 2^23181241 is an apocalyptic number.

23181241 is the 3405-th centered square number.

It is an amenable number.

23181241 is a deficient number, since it is larger than the sum of its proper divisors (1).

23181241 is an equidigital number, since it uses as much as digits as its factorization.

23181241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 22.

The square root of 23181241 is about 4814.6901250236. The cubic root of 23181241 is about 285.1317375987.

Adding to 23181241 its reverse (14218132), we get a palindrome (37399373).

The spelling of 23181241 in words is "twenty-three million, one hundred eighty-one thousand, two hundred forty-one".