213306023 has 4 divisors (see below), whose sum is σ = 243778320. Its totient is φ = 182833728.

The previous prime is 213306013. The next prime is 213306029. The reversal of 213306023 is 320603312.

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

It is not a de Polignac number, because 213306023 - 2¹⁴ = 213289639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213305986 and 213306004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213306029) 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, 15236138 + ... + 15236151.

It is an arithmetic number, because the mean of its divisors is an integer number (60944580).

Almost surely, 2^213306023 is an apocalyptic number.

213306023 is a deficient number, since it is larger than the sum of its proper divisors (30472297).

213306023 is an equidigital number, since it uses as much as digits as its factorization.

213306023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30472296.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 213306023 is about 14604.9999315303. Note that the first 4 decimals coincide. The cubic root of 213306023 is about 597.4951341492.

Adding to 213306023 its reverse (320603312), we get a palindrome (533909335).

The spelling of 213306023 in words is "two hundred thirteen million, three hundred six thousand, twenty-three".