23357281 has 2 divisors, whose sum is σ = 23357282. Its totient is φ = 23357280.

The previous prime is 23357273. The next prime is 23357287. The reversal of 23357281 is 18275332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23184225 + 173056 = 4815^2 + 416^2 .

It is a cyclic number.

It is not a de Polignac number, because 23357281 - 2³ = 23357273 is a prime.

It is a super-2 number, since 2×23357281² = 1091125151425922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23357287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11678640 + 11678641.

It is an arithmetic number, because the mean of its divisors is an integer number (11678641).

Almost surely, 2^23357281 is an apocalyptic number.

It is an amenable number.

23357281 is a deficient number, since it is larger than the sum of its proper divisors (1).

23357281 is an equidigital number, since it uses as much as digits as its factorization.

23357281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 31.

The square root of 23357281 is about 4832.9370987010. The cubic root of 23357281 is about 285.8516884706.

The spelling of 23357281 in words is "twenty-three million, three hundred fifty-seven thousand, two hundred eighty-one".