212322445 has 4 divisors (see below), whose sum is σ = 254786940. Its totient is φ = 169857952.

The previous prime is 212322443. The next prime is 212322457. The reversal of 212322445 is 544223212.

212322445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 121749156 + 90573289 = 11034^2 + 9517^2 .

It is a cyclic number.

It is not a de Polignac number, because 212322445 - 2¹ = 212322443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212322443) 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, 21232240 + ... + 21232249.

It is an arithmetic number, because the mean of its divisors is an integer number (63696735).

Almost surely, 2^212322445 is an apocalyptic number.

It is an amenable number.

212322445 is a deficient number, since it is larger than the sum of its proper divisors (42464495).

212322445 is an equidigital number, since it uses as much as digits as its factorization.

212322445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42464494.

The product of its digits is 3840, while the sum is 25.

The square root of 212322445 is about 14571.2883781771. The cubic root of 212322445 is about 596.5753465865.

Adding to 212322445 its reverse (544223212), we get a palindrome (756545657).

The spelling of 212322445 in words is "two hundred twelve million, three hundred twenty-two thousand, four hundred forty-five".