213433 has 4 divisors (see below), whose sum is σ = 232848. Its totient is φ = 194020.

The previous prime is 213407. The next prime is 213449. The reversal of 213433 is 334312.

213433 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213433 - 2¹⁷ = 82361 is a prime.

213433 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (213133) 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, 9691 + ... + 9712.

It is an arithmetic number, because the mean of its divisors is an integer number (58212).

2²¹³⁴³³ is an apocalyptic number.

It is an amenable number.

213433 is a deficient number, since it is larger than the sum of its proper divisors (19415).

213433 is a wasteful number, since it uses less digits than its factorization.

213433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19414.

The product of its digits is 216, while the sum is 16.

The square root of 213433 is about 461.9880950847. The cubic root of 213433 is about 59.7613669777.

Adding to 213433 its reverse (334312), we get a palindrome (547745).

It can be divided in two parts, 213 and 433, that multiplied together give a palindrome (92229).

The spelling of 213433 in words is "two hundred thirteen thousand, four hundred thirty-three".