213500453 has 2 divisors, whose sum is σ = 213500454. Its totient is φ = 213500452.

The previous prime is 213500411. The next prime is 213500477. The reversal of 213500453 is 354005312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 177235969 + 36264484 = 13313^2 + 6022^2 .

It is a cyclic number.

It is not a de Polignac number, because 213500453 - 2⁸ = 213500197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213503453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106750226 + 106750227.

It is an arithmetic number, because the mean of its divisors is an integer number (106750227).

Almost surely, 2^213500453 is an apocalyptic number.

It is an amenable number.

213500453 is a deficient number, since it is larger than the sum of its proper divisors (1).

213500453 is an equidigital number, since it uses as much as digits as its factorization.

213500453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 213500453 is about 14611.6546975351. The cubic root of 213500453 is about 597.6766194135.

Adding to 213500453 its reverse (354005312), we get a palindrome (567505765).

The spelling of 213500453 in words is "two hundred thirteen million, five hundred thousand, four hundred fifty-three".