212345205453 has 8 divisors (see below), whose sum is σ = 314585489600. Its totient is φ = 141563470284.

The previous prime is 212345205407. The next prime is 212345205491. The reversal of 212345205453 is 354502543212.

212345205453 is a `hidden beast` number, since 2 + 1 + 2 + 34 + 520 + 54 + 53 = 666.

It is not a de Polignac number, because 212345205453 - 2⁸ = 212345205197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (612345205453) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3932318593 + ... + 3932318646.

It is an arithmetic number, because the mean of its divisors is an integer number (39323186200).

Almost surely, 2^212345205453 is an apocalyptic number.

It is an amenable number.

212345205453 is a deficient number, since it is larger than the sum of its proper divisors (102240284147).

212345205453 is an equidigital number, since it uses as much as digits as its factorization.

212345205453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7864637248 (or 7864637242 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

Adding to 212345205453 its reverse (354502543212), we get a palindrome (566847748665).

The spelling of 212345205453 in words is "two hundred twelve billion, three hundred forty-five million, two hundred five thousand, four hundred fifty-three".