213326473 has 4 divisors (see below), whose sum is σ = 214559748. Its totient is φ = 212093200.

The previous prime is 213326461. The next prime is 213326479. The reversal of 213326473 is 374623312.

213326473 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 can be written as a sum of positive squares in 2 ways, for example, as 99840064 + 113486409 = 9992^2 + 10653^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213326473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213326479) 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, 616378 + ... + 616723.

It is an arithmetic number, because the mean of its divisors is an integer number (53639937).

Almost surely, 2^213326473 is an apocalyptic number.

It is an amenable number.

213326473 is a deficient number, since it is larger than the sum of its proper divisors (1233275).

213326473 is a wasteful number, since it uses less digits than its factorization.

213326473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1233274.

The product of its digits is 18144, while the sum is 31.

The square root of 213326473 is about 14605.7000174589. The cubic root of 213326473 is about 597.5142278201.

Adding to 213326473 its reverse (374623312), we get a palindrome (587949785).

The spelling of 213326473 in words is "two hundred thirteen million, three hundred twenty-six thousand, four hundred seventy-three".