212304453 has 4 divisors (see below), whose sum is σ = 283072608. Its totient is φ = 141536300.

The previous prime is 212304451. The next prime is 212304509. The reversal of 212304453 is 354403212.

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 212304453 - 2¹ = 212304451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212304451) 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, 35384073 + ... + 35384078.

It is an arithmetic number, because the mean of its divisors is an integer number (70768152).

Almost surely, 2^212304453 is an apocalyptic number.

It is an amenable number.

212304453 is a deficient number, since it is larger than the sum of its proper divisors (70768155).

212304453 is an equidigital number, since it uses as much as digits as its factorization.

212304453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70768154.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 212304453 is about 14570.6709866087. The cubic root of 212304453 is about 596.5584950366.

Adding to 212304453 its reverse (354403212), we get a palindrome (566707665).

The spelling of 212304453 in words is "two hundred twelve million, three hundred four thousand, four hundred fifty-three".