213534023 has 2 divisors, whose sum is σ = 213534024. Its totient is φ = 213534022.

The previous prime is 213534007. The next prime is 213534029. The reversal of 213534023 is 320435312.

213534023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213534023 - 2⁴ = 213534007 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213534023.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213534029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106767011 + 106767012.

It is an arithmetic number, because the mean of its divisors is an integer number (106767012).

Almost surely, 2^213534023 is an apocalyptic number.

213534023 is a deficient number, since it is larger than the sum of its proper divisors (1).

213534023 is an equidigital number, since it uses as much as digits as its factorization.

213534023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 213534023 is about 14612.8033929154. The cubic root of 213534023 is about 597.7079432387.

Adding to 213534023 its reverse (320435312), we get a palindrome (533969335).

The spelling of 213534023 in words is "two hundred thirteen million, five hundred thirty-four thousand, twenty-three".