212999997533 has 2 divisors, whose sum is σ = 212999997534. Its totient is φ = 212999997532.

The previous prime is 212999997521. The next prime is 212999997541. The reversal of 212999997533 is 335799999212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123142740889 + 89857256644 = 350917^2 + 299762^2 .

It is a cyclic number.

It is not a de Polignac number, because 212999997533 - 2⁸ = 212999997277 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212999993533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106499998766 + 106499998767.

It is an arithmetic number, because the mean of its divisors is an integer number (106499998767).

Almost surely, 2^212999997533 is an apocalyptic number.

It is an amenable number.

212999997533 is a deficient number, since it is larger than the sum of its proper divisors (1).

212999997533 is an equidigital number, since it uses as much as digits as its factorization.

212999997533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 74401740, while the sum is 68.

The spelling of 212999997533 in words is "two hundred twelve billion, nine hundred ninety-nine million, nine hundred ninety-seven thousand, five hundred thirty-three".