243031297 has 2 divisors, whose sum is σ = 243031298. Its totient is φ = 243031296.

The previous prime is 243031291. The next prime is 243031309. The reversal of 243031297 is 792130342.

243031297 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215531761 + 27499536 = 14681^2 + 5244^2 .

It is a cyclic number.

It is not a de Polignac number, because 243031297 - 2⁷ = 243031169 is a prime.

It is a super-2 number, since 2×243031297² = 118128422643004418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (243031291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121515648 + 121515649.

It is an arithmetic number, because the mean of its divisors is an integer number (121515649).

Almost surely, 2^243031297 is an apocalyptic number.

It is an amenable number.

243031297 is a deficient number, since it is larger than the sum of its proper divisors (1).

243031297 is an equidigital number, since it uses as much as digits as its factorization.

243031297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 243031297 is about 15589.4610875424. The cubic root of 243031297 is about 624.0519360467.

It can be divided in two parts, 24303 and 1297, that added together give a square (25600 = 160²).

The spelling of 243031297 in words is "two hundred forty-three million, thirty-one thousand, two hundred ninety-seven".