345216503 has 2 divisors, whose sum is σ = 345216504. Its totient is φ = 345216502.

The previous prime is 345216497. The next prime is 345216523. The reversal of 345216503 is 305612543.

It is a weak prime.

It is an emirp because it is prime and its reverse (305612543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 345216503 - 2⁶ = 345216439 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345216523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172608251 + 172608252.

It is an arithmetic number, because the mean of its divisors is an integer number (172608252).

Almost surely, 2^345216503 is an apocalyptic number.

345216503 is a deficient number, since it is larger than the sum of its proper divisors (1).

345216503 is an equidigital number, since it uses as much as digits as its factorization.

345216503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 345216503 is about 18580.0027717974. The cubic root of 345216503 is about 701.5045888706.

The spelling of 345216503 in words is "three hundred forty-five million, two hundred sixteen thousand, five hundred three".