243400151 has 2 divisors, whose sum is σ = 243400152. Its totient is φ = 243400150.

The previous prime is 243400147. The next prime is 243400153. The reversal of 243400151 is 151004342.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 243400151 - 2² = 243400147 is a prime.

Together with 243400153, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (243400153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121700075 + 121700076.

It is an arithmetic number, because the mean of its divisors is an integer number (121700076).

Almost surely, 2^243400151 is an apocalyptic number.

243400151 is a deficient number, since it is larger than the sum of its proper divisors (1).

243400151 is an equidigital number, since it uses as much as digits as its factorization.

243400151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 243400151 is about 15601.2868379503. The cubic root of 243400151 is about 624.3674889569.

Adding to 243400151 its reverse (151004342), we get a palindrome (394404493).

The spelling of 243400151 in words is "two hundred forty-three million, four hundred thousand, one hundred fifty-one".