212146631 has 2 divisors, whose sum is σ = 212146632. Its totient is φ = 212146630.

The previous prime is 212146607. The next prime is 212146633. The reversal of 212146631 is 136641212.

212146631 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212146631 - 2¹⁰ = 212145607 is a prime.

It is a super-2 number, since 2×212146631² = 90012386089300322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 212146633, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212146631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212146633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106073315 + 106073316.

It is an arithmetic number, because the mean of its divisors is an integer number (106073316).

Almost surely, 2^212146631 is an apocalyptic number.

212146631 is a deficient number, since it is larger than the sum of its proper divisors (1).

212146631 is an equidigital number, since it uses as much as digits as its factorization.

212146631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 26.

The square root of 212146631 is about 14565.2542373966. The cubic root of 212146631 is about 596.4106360025.

Adding to 212146631 its reverse (136641212), we get a palindrome (348787843).

The spelling of 212146631 in words is "two hundred twelve million, one hundred forty-six thousand, six hundred thirty-one".