213320673 has 12 divisors (see below), whose sum is σ = 312351780. Its totient is φ = 140265216.

The previous prime is 213320621. The next prime is 213320677. The reversal of 213320673 is 376023312.

213320673 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 107806689 + 105513984 = 10383^2 + 10272^2 .

It is not a de Polignac number, because 213320673 - 2²⁶ = 146211809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213320677) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 161688 + ... + 163001.

It is an arithmetic number, because the mean of its divisors is an integer number (26029315).

Almost surely, 2^213320673 is an apocalyptic number.

It is an amenable number.

213320673 is a deficient number, since it is larger than the sum of its proper divisors (99031107).

213320673 is a wasteful number, since it uses less digits than its factorization.

213320673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324768 (or 324765 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 27.

The square root of 213320673 is about 14605.5014634897. The cubic root of 213320673 is about 597.5088126242.

Adding to 213320673 its reverse (376023312), we get a palindrome (589343985).

The spelling of 213320673 in words is "two hundred thirteen million, three hundred twenty thousand, six hundred seventy-three".