345542243 has 2 divisors, whose sum is σ = 345542244. Its totient is φ = 345542242.

The previous prime is 345542147. The next prime is 345542257. The reversal of 345542243 is 342245543.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345542243 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (345542273) 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, 172771121 + 172771122.

It is an arithmetic number, because the mean of its divisors is an integer number (172771122).

Almost surely, 2^345542243 is an apocalyptic number.

345542243 is a deficient number, since it is larger than the sum of its proper divisors (1).

345542243 is an equidigital number, since it uses as much as digits as its factorization.

345542243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57600, while the sum is 32.

The square root of 345542243 is about 18588.7665809219. The cubic root of 345542243 is about 701.7251618236.

Adding to 345542243 its reverse (342245543), we get a palindrome (687787786).

The spelling of 345542243 in words is "three hundred forty-five million, five hundred forty-two thousand, two hundred forty-three".