216969807 has 16 divisors (see below), whose sum is σ = 293436000. Its totient is φ = 142585344.

The previous prime is 216969791. The next prime is 216969811. The reversal of 216969807 is 708969612.

It is not a de Polignac number, because 216969807 - 2⁴ = 216969791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216969847) 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 in 15 ways as a sum of consecutive naturals, for example, 102819 + ... + 104907.

It is an arithmetic number, because the mean of its divisors is an integer number (18339750).

Almost surely, 2^216969807 is an apocalyptic number.

216969807 is a deficient number, since it is larger than the sum of its proper divisors (76466193).

216969807 is a wasteful number, since it uses less digits than its factorization.

216969807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2570.

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 216969807 is about 14729.8950098091. The cubic root of 216969807 is about 600.8966288714.

The spelling of 216969807 in words is "two hundred sixteen million, nine hundred sixty-nine thousand, eight hundred seven".