213432473 has 4 divisors (see below), whose sum is σ = 216931428. Its totient is φ = 209933520.

The previous prime is 213432463. The next prime is 213432481. The reversal of 213432473 is 374234312.

213432473 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 7997584 + 205434889 = 2828^2 + 14333^2 .

It is a cyclic number.

It is not a de Polignac number, because 213432473 - 2⁶ = 213432409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213432403) 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, 1749386 + ... + 1749507.

It is an arithmetic number, because the mean of its divisors is an integer number (54232857).

Almost surely, 2^213432473 is an apocalyptic number.

It is an amenable number.

213432473 is a deficient number, since it is larger than the sum of its proper divisors (3498955).

213432473 is an equidigital number, since it uses as much as digits as its factorization.

213432473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3498954.

The product of its digits is 12096, while the sum is 29.

The square root of 213432473 is about 14609.3282870911. The cubic root of 213432473 is about 597.6131779093.

Adding to 213432473 its reverse (374234312), we get a palindrome (587666785).

The spelling of 213432473 in words is "two hundred thirteen million, four hundred thirty-two thousand, four hundred seventy-three".