216450663 has 16 divisors (see below), whose sum is σ = 339056256. Its totient is φ = 121091040.

The previous prime is 216450659. The next prime is 216450667. The reversal of 216450663 is 366054612.

It is an interprime number because it is at equal distance from previous prime (216450659) and next prime (216450667).

It is not a de Polignac number, because 216450663 - 2² = 216450659 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216450667) 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, 251845 + ... + 252702.

It is an arithmetic number, because the mean of its divisors is an integer number (21191016).

Almost surely, 2^216450663 is an apocalyptic number.

216450663 is a deficient number, since it is larger than the sum of its proper divisors (122605593).

216450663 is a wasteful number, since it uses less digits than its factorization.

216450663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504574.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 216450663 is about 14712.2623345290. The cubic root of 216450663 is about 600.4169906864.

The spelling of 216450663 in words is "two hundred sixteen million, four hundred fifty thousand, six hundred sixty-three".