243151297 has 2 divisors, whose sum is σ = 243151298. Its totient is φ = 243151296.

The previous prime is 243151261. The next prime is 243151319. The reversal of 243151297 is 792151342.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 238115761 + 5035536 = 15431^2 + 2244^2 .

It is a cyclic number.

It is not a de Polignac number, because 243151297 - 2⁷ = 243151169 is a prime.

It is not a weakly prime, because it can be changed into another prime (243151217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121575648 + 121575649.

It is an arithmetic number, because the mean of its divisors is an integer number (121575649).

Almost surely, 2^243151297 is an apocalyptic number.

It is an amenable number.

243151297 is a deficient number, since it is larger than the sum of its proper divisors (1).

243151297 is an equidigital number, since it uses as much as digits as its factorization.

243151297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 34.

The square root of 243151297 is about 15593.3093665200. The cubic root of 243151297 is about 624.1546305162.

The spelling of 243151297 in words is "two hundred forty-three million, one hundred fifty-one thousand, two hundred ninety-seven".