212251447357 has 2 divisors, whose sum is σ = 212251447358. Its totient is φ = 212251447356.

The previous prime is 212251447337. The next prime is 212251447391. The reversal of 212251447357 is 753744152212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128626953316 + 83624494041 = 358646^2 + 289179^2 .

It is a cyclic number.

It is not a de Polignac number, because 212251447357 - 2¹¹ = 212251445309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212251447337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106125723678 + 106125723679.

It is an arithmetic number, because the mean of its divisors is an integer number (106125723679).

Almost surely, 2^212251447357 is an apocalyptic number.

It is an amenable number.

212251447357 is a deficient number, since it is larger than the sum of its proper divisors (1).

212251447357 is an equidigital number, since it uses as much as digits as its factorization.

212251447357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 470400, while the sum is 43.

Adding to 212251447357 its reverse (753744152212), we get a palindrome (965995599569).

The spelling of 212251447357 in words is "two hundred twelve billion, two hundred fifty-one million, four hundred forty-seven thousand, three hundred fifty-seven".