240523313 has 2 divisors, whose sum is σ = 240523314. Its totient is φ = 240523312.

The previous prime is 240523307. The next prime is 240523333. The reversal of 240523313 is 313325042.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164275489 + 76247824 = 12817^2 + 8732^2 .

It is a cyclic number.

It is not a de Polignac number, because 240523313 - 2⁶ = 240523249 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (240523333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120261656 + 120261657.

It is an arithmetic number, because the mean of its divisors is an integer number (120261657).

Almost surely, 2^240523313 is an apocalyptic number.

It is an amenable number.

240523313 is a deficient number, since it is larger than the sum of its proper divisors (1).

240523313 is an equidigital number, since it uses as much as digits as its factorization.

240523313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 240523313 is about 15508.8140423438. The cubic root of 240523313 is about 621.8978552849.

Adding to 240523313 its reverse (313325042), we get a palindrome (553848355).

The spelling of 240523313 in words is "two hundred forty million, five hundred twenty-three thousand, three hundred thirteen".