216319801 has 4 divisors (see below), whose sum is σ = 216704592. Its totient is φ = 215935012.

The previous prime is 216319793. The next prime is 216319811. The reversal of 216319801 is 108913612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 216319801 - 2³ = 216319793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216319811) 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, 191551 + ... + 192676.

It is an arithmetic number, because the mean of its divisors is an integer number (54176148).

Almost surely, 2^216319801 is an apocalyptic number.

It is an amenable number.

216319801 is a deficient number, since it is larger than the sum of its proper divisors (384791).

216319801 is an equidigital number, since it uses as much as digits as its factorization.

216319801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384790.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 216319801 is about 14707.8142835705. The cubic root of 216319801 is about 600.2959660199.

The spelling of 216319801 in words is "two hundred sixteen million, three hundred nineteen thousand, eight hundred one".