212322423457 has 4 divisors (see below), whose sum is σ = 224811977796. Its totient is φ = 199832869120.

The previous prime is 212322423283. The next prime is 212322423527. The reversal of 212322423457 is 754324223212.

212322423457 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 108225208576 + 104097214881 = 328976^2 + 322641^2 .

It is a cyclic number.

It is not a de Polignac number, because 212322423457 - 2²⁷ = 212188205729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212322421457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6244777144 + ... + 6244777177.

It is an arithmetic number, because the mean of its divisors is an integer number (56202994449).

Almost surely, 2^212322423457 is an apocalyptic number.

It is an amenable number.

212322423457 is a deficient number, since it is larger than the sum of its proper divisors (12489554339).

212322423457 is a wasteful number, since it uses less digits than its factorization.

212322423457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12489554338.

The product of its digits is 161280, while the sum is 37.

Adding to 212322423457 its reverse (754324223212), we get a palindrome (966646646669).

The spelling of 212322423457 in words is "two hundred twelve billion, three hundred twenty-two million, four hundred twenty-three thousand, four hundred fifty-seven".