216464407 has 2 divisors, whose sum is σ = 216464408. Its totient is φ = 216464406.

The previous prime is 216464377. The next prime is 216464447. The reversal of 216464407 is 704464612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216464407 - 2²³ = 208075799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216464447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108232203 + 108232204.

It is an arithmetic number, because the mean of its divisors is an integer number (108232204).

Almost surely, 2^216464407 is an apocalyptic number.

216464407 is a deficient number, since it is larger than the sum of its proper divisors (1).

216464407 is an equidigital number, since it uses as much as digits as its factorization.

216464407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 34.

The square root of 216464407 is about 14712.7294204712. The cubic root of 216464407 is about 600.4296986731.

The spelling of 216464407 in words is "two hundred sixteen million, four hundred sixty-four thousand, four hundred seven".