213660323 has 4 divisors (see below), whose sum is σ = 214089000. Its totient is φ = 213231648.

The previous prime is 213660283. The next prime is 213660329. The reversal of 213660323 is 323066312.

213660323 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.

It is a cyclic number.

It is not a de Polignac number, because 213660323 - 2⁸ = 213660067 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213660292 and 213660301.

It is not an unprimeable number, because it can be changed into a prime (213660329) 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, 213590 + ... + 214587.

It is an arithmetic number, because the mean of its divisors is an integer number (53522250).

Almost surely, 2^213660323 is an apocalyptic number.

213660323 is a deficient number, since it is larger than the sum of its proper divisors (428677).

213660323 is an equidigital number, since it uses as much as digits as its factorization.

213660323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428676.

The product of its (nonzero) digits is 3888, while the sum is 26.

The square root of 213660323 is about 14617.1243067848. The cubic root of 213660323 is about 597.8257630807.

The spelling of 213660323 in words is "two hundred thirteen million, six hundred sixty thousand, three hundred twenty-three".