212513453 has 4 divisors (see below), whose sum is σ = 213197088. Its totient is φ = 211829820.

The previous prime is 212513443. The next prime is 212513467. The reversal of 212513453 is 354315212.

It is a happy number.

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 212513453 - 2¹⁰ = 212512429 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212513443) 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, 341351 + ... + 341972.

It is an arithmetic number, because the mean of its divisors is an integer number (53299272).

Almost surely, 2^212513453 is an apocalyptic number.

It is an amenable number.

212513453 is a deficient number, since it is larger than the sum of its proper divisors (683635).

212513453 is an equidigital number, since it uses as much as digits as its factorization.

212513453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683634.

The product of its digits is 3600, while the sum is 26.

The square root of 212513453 is about 14577.8411639035. The cubic root of 212513453 is about 596.7541885837.

Adding to 212513453 its reverse (354315212), we get a palindrome (566828665).

The spelling of 212513453 in words is "two hundred twelve million, five hundred thirteen thousand, four hundred fifty-three".