243415253 has 2 divisors, whose sum is σ = 243415254. Its totient is φ = 243415252.

The previous prime is 243415247. The next prime is 243415259. The reversal of 243415253 is 352514342.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (243415247) and next prime (243415259).

It can be written as a sum of positive squares in only one way, i.e., 243297604 + 117649 = 15598^2 + 343^2 .

It is a cyclic number.

It is not a de Polignac number, because 243415253 - 2⁶ = 243415189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243415259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121707626 + 121707627.

It is an arithmetic number, because the mean of its divisors is an integer number (121707627).

Almost surely, 2^243415253 is an apocalyptic number.

It is an amenable number.

243415253 is a deficient number, since it is larger than the sum of its proper divisors (1).

243415253 is an equidigital number, since it uses as much as digits as its factorization.

243415253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 29.

The square root of 243415253 is about 15601.7708289796. The cubic root of 243415253 is about 624.3804018533.

Adding to 243415253 its reverse (352514342), we get a palindrome (595929595).

The spelling of 243415253 in words is "two hundred forty-three million, four hundred fifteen thousand, two hundred fifty-three".