216202001 has 4 divisors (see below), whose sum is σ = 225602112. Its totient is φ = 206801892.

The previous prime is 216201977. The next prime is 216202009. The reversal of 216202001 is 100202612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 216202001 - 2¹⁰ = 216200977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216202009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4700021 + ... + 4700066.

It is an arithmetic number, because the mean of its divisors is an integer number (56400528).

Almost surely, 2^216202001 is an apocalyptic number.

It is an amenable number.

216202001 is a deficient number, since it is larger than the sum of its proper divisors (9400111).

216202001 is an equidigital number, since it uses as much as digits as its factorization.

216202001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9400110.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 216202001 is about 14703.8090643207. The cubic root of 216202001 is about 600.1869796879.

Adding to 216202001 its reverse (100202612), we get a palindrome (316404613).

The spelling of 216202001 in words is "two hundred sixteen million, two hundred two thousand, one".