216601373 has 4 divisors (see below), whose sum is σ = 226018848. Its totient is φ = 207183900.

The previous prime is 216601339. The next prime is 216601379. The reversal of 216601373 is 373106612.

216601373 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 216601373 - 2²⁰ = 215552797 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216601379) 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, 4708703 + ... + 4708748.

It is an arithmetic number, because the mean of its divisors is an integer number (56504712).

Almost surely, 2^216601373 is an apocalyptic number.

216601373 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

216601373 is a deficient number, since it is larger than the sum of its proper divisors (9417475).

216601373 is an equidigital number, since it uses as much as digits as its factorization.

216601373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9417474.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 216601373 is about 14717.3833611821. The cubic root of 216601373 is about 600.5563108894.

Adding to 216601373 its reverse (373106612), we get a palindrome (589707985).

The spelling of 216601373 in words is "two hundred sixteen million, six hundred one thousand, three hundred seventy-three".