216010001 has 2 divisors, whose sum is σ = 216010002. Its totient is φ = 216010000.

The previous prime is 216009947. The next prime is 216010019. The reversal of 216010001 is 100010612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124902976 + 91107025 = 11176^2 + 9545^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216010001 is a prime.

It is not a weakly prime, because it can be changed into another prime (216010021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108005000 + 108005001.

It is an arithmetic number, because the mean of its divisors is an integer number (108005001).

Almost surely, 2^216010001 is an apocalyptic number.

It is an amenable number.

216010001 is a deficient number, since it is larger than the sum of its proper divisors (1).

216010001 is an equidigital number, since it uses as much as digits as its factorization.

216010001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 216010001 is about 14697.2786936902. The cubic root of 216010001 is about 600.0092600423.

Adding to 216010001 its reverse (100010612), we get a palindrome (316020613).

The spelling of 216010001 in words is "two hundred sixteen million, ten thousand, one".