212620643 has 2 divisors, whose sum is σ = 212620644. Its totient is φ = 212620642.

The previous prime is 212620637. The next prime is 212620669. The reversal of 212620643 is 346026212.

212620643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (212620669) can be obtained adding 212620643 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212620643 - 2¹⁶ = 212555107 is a prime.

It is not a weakly prime, because it can be changed into another prime (212620693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106310321 + 106310322.

It is an arithmetic number, because the mean of its divisors is an integer number (106310322).

Almost surely, 2^212620643 is an apocalyptic number.

212620643 is a deficient number, since it is larger than the sum of its proper divisors (1).

212620643 is an equidigital number, since it uses as much as digits as its factorization.

212620643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 212620643 is about 14581.5171707199. The cubic root of 212620643 is about 596.8545043189.

Adding to 212620643 its reverse (346026212), we get a palindrome (558646855).

The spelling of 212620643 in words is "two hundred twelve million, six hundred twenty thousand, six hundred forty-three".