23240381 has 2 divisors, whose sum is σ = 23240382. Its totient is φ = 23240380.

The previous prime is 23240291. The next prime is 23240417. The reversal of 23240381 is 18304232.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22714756 + 525625 = 4766^2 + 725^2 .

It is a cyclic number.

It is not a de Polignac number, because 23240381 - 2²² = 19046077 is a prime.

It is a super-2 number, since 2×23240381² = 1080230618050322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23240881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11620190 + 11620191.

It is an arithmetic number, because the mean of its divisors is an integer number (11620191).

Almost surely, 2^23240381 is an apocalyptic number.

It is an amenable number.

23240381 is a deficient number, since it is larger than the sum of its proper divisors (1).

23240381 is an equidigital number, since it uses as much as digits as its factorization.

23240381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 23240381 is about 4820.8278334742. The cubic root of 23240381 is about 285.3740077920.

The spelling of 23240381 in words is "twenty-three million, two hundred forty thousand, three hundred eighty-one".