216764701 has 2 divisors, whose sum is σ = 216764702. Its totient is φ = 216764700.

The previous prime is 216764651. The next prime is 216764729. The reversal of 216764701 is 107467612.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130553476 + 86211225 = 11426^2 + 9285^2 .

It is a cyclic number.

It is not a de Polignac number, because 216764701 - 2²¹ = 214667549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216764791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108382350 + 108382351.

It is an arithmetic number, because the mean of its divisors is an integer number (108382351).

Almost surely, 2^216764701 is an apocalyptic number.

It is an amenable number.

216764701 is a deficient number, since it is larger than the sum of its proper divisors (1).

216764701 is an equidigital number, since it uses as much as digits as its factorization.

216764701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 216764701 is about 14722.9311280057. The cubic root of 216764701 is about 600.7072225477.

The spelling of 216764701 in words is "two hundred sixteen million, seven hundred sixty-four thousand, seven hundred one".