212445533 has 4 divisors (see below), whose sum is σ = 212800800. Its totient is φ = 212090268.

The previous prime is 212445529. The next prime is 212445547. The reversal of 212445533 is 335544212.

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 212445533 - 2² = 212445529 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 212445496 and 212445505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212445433) 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, 176735 + ... + 177932.

It is an arithmetic number, because the mean of its divisors is an integer number (53200200).

Almost surely, 2^212445533 is an apocalyptic number.

It is an amenable number.

212445533 is a deficient number, since it is larger than the sum of its proper divisors (355267).

212445533 is an equidigital number, since it uses as much as digits as its factorization.

212445533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355266.

The product of its digits is 14400, while the sum is 29.

The square root of 212445533 is about 14575.5114146983. The cubic root of 212445533 is about 596.6906069411.

Adding to 212445533 its reverse (335544212), we get a palindrome (547989745).

The spelling of 212445533 in words is "two hundred twelve million, four hundred forty-five thousand, five hundred thirty-three".