216963655 has 8 divisors (see below), whose sum is σ = 262934784. Its totient is φ = 171852000.

The previous prime is 216963653. The next prime is 216963667. The reversal of 216963655 is 556369612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 216963655 - 2¹ = 216963653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216963653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214311 + ... + 215320.

It is an arithmetic number, because the mean of its divisors is an integer number (32866848).

Almost surely, 2^216963655 is an apocalyptic number.

216963655 is a deficient number, since it is larger than the sum of its proper divisors (45971129).

216963655 is a wasteful number, since it uses less digits than its factorization.

216963655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429737.

The product of its digits is 291600, while the sum is 43.

The square root of 216963655 is about 14729.6861813143. The cubic root of 216963655 is about 600.8909495083.

The spelling of 216963655 in words is "two hundred sixteen million, nine hundred sixty-three thousand, six hundred fifty-five".