216343677 has 16 divisors (see below), whose sum is σ = 315947520. Its totient is φ = 130590000.

The previous prime is 216343669. The next prime is 216343691. The reversal of 216343677 is 776343612.

It is not a de Polignac number, because 216343677 - 2³ = 216343669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216343607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4777 + ... + 21342.

It is an arithmetic number, because the mean of its divisors is an integer number (19746720).

Almost surely, 2^216343677 is an apocalyptic number.

It is an amenable number.

216343677 is a deficient number, since it is larger than the sum of its proper divisors (99603843).

216343677 is a wasteful number, since it uses less digits than its factorization.

216343677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26384.

The product of its digits is 127008, while the sum is 39.

The square root of 216343677 is about 14708.6259385437. The cubic root of 216343677 is about 600.3180508208.

The spelling of 216343677 in words is "two hundred sixteen million, three hundred forty-three thousand, six hundred seventy-seven".