216423463 has 4 divisors (see below), whose sum is σ = 216492328. Its totient is φ = 216354600.

The previous prime is 216423457. The next prime is 216423503. The reversal of 216423463 is 364324612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216423463 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 (216423563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29481 + ... + 36082.

It is an arithmetic number, because the mean of its divisors is an integer number (54123082).

Almost surely, 2^216423463 is an apocalyptic number.

216423463 is a deficient number, since it is larger than the sum of its proper divisors (68865).

216423463 is an equidigital number, since it uses as much as digits as its factorization.

216423463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68864.

The product of its digits is 20736, while the sum is 31.

The square root of 216423463 is about 14711.3379065264. The cubic root of 216423463 is about 600.3918394178.

The spelling of 216423463 in words is "two hundred sixteen million, four hundred twenty-three thousand, four hundred sixty-three".