213442433 has 4 divisors (see below), whose sum is σ = 218648388. Its totient is φ = 208236480.

The previous prime is 213442417. The next prime is 213442441. The reversal of 213442433 is 334244312.

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 22118209 + 191324224 = 4703^2 + 13832^2 .

It is a cyclic number.

It is not a de Polignac number, because 213442433 - 2⁴ = 213442417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213442483) 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, 2602916 + ... + 2602997.

It is an arithmetic number, because the mean of its divisors is an integer number (54662097).

Almost surely, 2^213442433 is an apocalyptic number.

It is an amenable number.

213442433 is a deficient number, since it is larger than the sum of its proper divisors (5205955).

213442433 is an equidigital number, since it uses as much as digits as its factorization.

213442433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5205954.

The product of its digits is 6912, while the sum is 26.

The square root of 213442433 is about 14609.6691612096. The cubic root of 213442433 is about 597.6224737998.

Adding to 213442433 its reverse (334244312), we get a palindrome (547686745).

The spelling of 213442433 in words is "two hundred thirteen million, four hundred forty-two thousand, four hundred thirty-three".