215345203 has 2 divisors, whose sum is σ = 215345204. Its totient is φ = 215345202.

The previous prime is 215345191. The next prime is 215345233. The reversal of 215345203 is 302543512.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215345203 is a prime.

It is a super-2 number, since 2×215345203² = 92747112910222418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (215345233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107672601 + 107672602.

It is an arithmetic number, because the mean of its divisors is an integer number (107672602).

Almost surely, 2^215345203 is an apocalyptic number.

215345203 is a deficient number, since it is larger than the sum of its proper divisors (1).

215345203 is an equidigital number, since it uses as much as digits as its factorization.

215345203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 215345203 is about 14674.6449020070. The cubic root of 215345203 is about 599.3930927945.

Adding to 215345203 its reverse (302543512), we get a palindrome (517888715).

The spelling of 215345203 in words is "two hundred fifteen million, three hundred forty-five thousand, two hundred three".