345216303 has 8 divisors (see below), whose sum is σ = 511431600. Its totient is φ = 230144184.

The previous prime is 345216293. The next prime is 345216317. The reversal of 345216303 is 303612543.

It is a happy number.

345216303 is a `hidden beast` number, since 3 + 4 + 5 + 21 + 630 + 3 = 666.

It is not a de Polignac number, because 345216303 - 2⁶ = 345216239 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 12785789 = 345216303 / (3 + 4 + 5 + 2 + 1 + 6 + 3 + 0 + 3).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345216323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6392868 + ... + 6392921.

It is an arithmetic number, because the mean of its divisors is an integer number (63928950).

Almost surely, 2^345216303 is an apocalyptic number.

345216303 is a deficient number, since it is larger than the sum of its proper divisors (166215297).

345216303 is a wasteful number, since it uses less digits than its factorization.

345216303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12785798 (or 12785792 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 345216303 is about 18579.9973896661. The cubic root of 345216303 is about 701.5044533992.

Adding to 345216303 its reverse (303612543), we get a palindrome (648828846).

The spelling of 345216303 in words is "three hundred forty-five million, two hundred sixteen thousand, three hundred three".