216394001 has 2 divisors, whose sum is σ = 216394002. Its totient is φ = 216394000.

The previous prime is 216393997. The next prime is 216394069. The reversal of 216394001 is 100493612.

216394001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 178890625 + 37503376 = 13375^2 + 6124^2 .

It is a cyclic number.

It is not a de Polignac number, because 216394001 - 2² = 216393997 is a prime.

It is not a weakly prime, because it can be changed into another prime (216394901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108197000 + 108197001.

It is an arithmetic number, because the mean of its divisors is an integer number (108197001).

Almost surely, 2^216394001 is an apocalyptic number.

It is an amenable number.

216394001 is a deficient number, since it is larger than the sum of its proper divisors (1).

216394001 is an equidigital number, since it uses as much as digits as its factorization.

216394001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 216394001 is about 14710.3365359192. The cubic root of 216394001 is about 600.3645941477.

The spelling of 216394001 in words is "two hundred sixteen million, three hundred ninety-four thousand, one".