216457667 has 2 divisors, whose sum is σ = 216457668. Its totient is φ = 216457666.

The previous prime is 216457639. The next prime is 216457691. The reversal of 216457667 is 766754612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216457667 - 2¹⁸ = 216195523 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (216457567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108228833 + 108228834.

It is an arithmetic number, because the mean of its divisors is an integer number (108228834).

Almost surely, 2^216457667 is an apocalyptic number.

216457667 is a deficient number, since it is larger than the sum of its proper divisors (1).

216457667 is an equidigital number, since it uses as much as digits as its factorization.

216457667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 423360, while the sum is 44.

The square root of 216457667 is about 14712.5003653356. The cubic root of 216457667 is about 600.4234667969.

The spelling of 216457667 in words is "two hundred sixteen million, four hundred fifty-seven thousand, six hundred sixty-seven".