212316041522 has 54 divisors (see below), whose sum is σ = 350775764631. Its totient is φ = 96338161920.

The previous prime is 212316041513. The next prime is 212316041549. The reversal of 212316041522 is 225140613212.

It can be written as a sum of positive squares in 5 ways, for example, as 18602504881 + 193713536641 = 136391^2 + 440129^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=325819.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 601461698 + ... + 601462050.

Almost surely, 2^212316041522 is an apocalyptic number.

212316041522 is a deficient number, since it is larger than the sum of its proper divisors (138459723109).

212316041522 is an frugal number, since it uses more digits than its factorization.

212316041522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876 (or 439 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 212316041522 its reverse (225140613212), we get a palindrome (437456654734).

The spelling of 212316041522 in words is "two hundred twelve billion, three hundred sixteen million, forty-one thousand, five hundred twenty-two".