240243253 has 2 divisors, whose sum is σ = 240243254. Its totient is φ = 240243252.

The previous prime is 240243247. The next prime is 240243259. The reversal of 240243253 is 352342042.

240243253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (240243247) and next prime (240243259).

It can be written as a sum of positive squares in only one way, i.e., 234181809 + 6061444 = 15303^2 + 2462^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-240243253 is a prime.

It is a super-2 number, since 2×240243253² = 115433641224044018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240243259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120121626 + 120121627.

It is an arithmetic number, because the mean of its divisors is an integer number (120121627).

Almost surely, 2^240243253 is an apocalyptic number.

It is an amenable number.

240243253 is a deficient number, since it is larger than the sum of its proper divisors (1).

240243253 is an equidigital number, since it uses as much as digits as its factorization.

240243253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 240243253 is about 15499.7823533106. The cubic root of 240243253 is about 621.6563868601.

Adding to 240243253 its reverse (352342042), we get a palindrome (592585295).

The spelling of 240243253 in words is "two hundred forty million, two hundred forty-three thousand, two hundred fifty-three".