216242603 has 2 divisors, whose sum is σ = 216242604. Its totient is φ = 216242602.

The previous prime is 216242599. The next prime is 216242633. The reversal of 216242603 is 306242612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216242603 - 2² = 216242599 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (216242633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108121301 + 108121302.

It is an arithmetic number, because the mean of its divisors is an integer number (108121302).

Almost surely, 2^216242603 is an apocalyptic number.

216242603 is a deficient number, since it is larger than the sum of its proper divisors (1).

216242603 is an equidigital number, since it uses as much as digits as its factorization.

216242603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 216242603 is about 14705.1896621567. The cubic root of 216242603 is about 600.2245483603.

Subtracting 216242603 from its reverse (306242612), we obtain a palindrome (90000009).

The spelling of 216242603 in words is "two hundred sixteen million, two hundred forty-two thousand, six hundred three".