213453453 has 4 divisors (see below), whose sum is σ = 284604608. Its totient is φ = 142302300.

The previous prime is 213453451. The next prime is 213453463. The reversal of 213453453 is 354354312.

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 not a de Polignac number, because 213453453 - 2¹ = 213453451 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213453453.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213453451) 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 in 3 ways as a sum of consecutive naturals, for example, 35575573 + ... + 35575578.

It is an arithmetic number, because the mean of its divisors is an integer number (71151152).

Almost surely, 2^213453453 is an apocalyptic number.

It is an amenable number.

213453453 is a deficient number, since it is larger than the sum of its proper divisors (71151155).

213453453 is an equidigital number, since it uses as much as digits as its factorization.

213453453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71151154.

The product of its digits is 21600, while the sum is 30.

The square root of 213453453 is about 14610.0463038281. The cubic root of 213453453 is about 597.6327586749.

The spelling of 213453453 in words is "two hundred thirteen million, four hundred fifty-three thousand, four hundred fifty-three".