213004453 has 2 divisors, whose sum is σ = 213004454. Its totient is φ = 213004452.

The previous prime is 213004439. The next prime is 213004483. The reversal of 213004453 is 354400312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212488929 + 515524 = 14577^2 + 718^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213004453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213004483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106502226 + 106502227.

It is an arithmetic number, because the mean of its divisors is an integer number (106502227).

Almost surely, 2^213004453 is an apocalyptic number.

It is an amenable number.

213004453 is a deficient number, since it is larger than the sum of its proper divisors (1).

213004453 is an equidigital number, since it uses as much as digits as its factorization.

213004453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 213004453 is about 14594.6720757953. The cubic root of 213004453 is about 597.2134237265.

Adding to 213004453 its reverse (354400312), we get a palindrome (567404765).

The spelling of 213004453 in words is "two hundred thirteen million, four thousand, four hundred fifty-three".