216494363 has 4 divisors (see below), whose sum is σ = 222345600. Its totient is φ = 210643128.

The previous prime is 216494339. The next prime is 216494393. The reversal of 216494363 is 363494612.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 216494363 - 2²⁰ = 215445787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216494393) 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, 2925563 + ... + 2925636.

It is an arithmetic number, because the mean of its divisors is an integer number (55586400).

Almost surely, 2^216494363 is an apocalyptic number.

216494363 is a deficient number, since it is larger than the sum of its proper divisors (5851237).

216494363 is an equidigital number, since it uses as much as digits as its factorization.

216494363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5851236.

The product of its digits is 93312, while the sum is 38.

The square root of 216494363 is about 14713.7474152576. The cubic root of 216494363 is about 600.4573947467.

The spelling of 216494363 in words is "two hundred sixteen million, four hundred ninety-four thousand, three hundred sixty-three".