216619001 has 2 divisors, whose sum is σ = 216619002. Its totient is φ = 216619000.

The previous prime is 216618989. The next prime is 216619069. The reversal of 216619001 is 100916612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215355625 + 1263376 = 14675^2 + 1124^2 .

It is a cyclic number.

It is not a de Polignac number, because 216619001 - 2⁶ = 216618937 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (216619901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108309500 + 108309501.

It is an arithmetic number, because the mean of its divisors is an integer number (108309501).

Almost surely, 2^216619001 is an apocalyptic number.

It is an amenable number.

216619001 is a deficient number, since it is larger than the sum of its proper divisors (1).

216619001 is an equidigital number, since it uses as much as digits as its factorization.

216619001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 216619001 is about 14717.9822326296. The cubic root of 216619001 is about 600.5726024443.

The spelling of 216619001 in words is "two hundred sixteen million, six hundred nineteen thousand, one".