216801003 has 6 divisors (see below), whose sum is σ = 289102012. Its totient is φ = 144517000.

The previous prime is 216800977. The next prime is 216801031. The reversal of 216801003 is 300108612.

It is not a de Polignac number, because 216801003 - 2⁸ = 216800747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216801103) 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 in 5 ways as a sum of consecutive naturals, for example, 21253 + ... + 29753.

Almost surely, 2^216801003 is an apocalyptic number.

216801003 is a deficient number, since it is larger than the sum of its proper divisors (72301009).

216801003 is an frugal number, since it uses more digits than its factorization.

216801003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17005 (or 8504 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 216801003 is about 14724.1639151430. The cubic root of 216801003 is about 600.7407545393.

Adding to 216801003 its reverse (300108612), we get a palindrome (516909615).

The spelling of 216801003 in words is "two hundred sixteen million, eight hundred one thousand, three".