212144551 has 2 divisors, whose sum is σ = 212144552. Its totient is φ = 212144550.

The previous prime is 212144549. The next prime is 212144627. The reversal of 212144551 is 155441212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212144551 - 2¹ = 212144549 is a prime.

Together with 212144549, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212148551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106072275 + 106072276.

It is an arithmetic number, because the mean of its divisors is an integer number (106072276).

Almost surely, 2^212144551 is an apocalyptic number.

212144551 is a deficient number, since it is larger than the sum of its proper divisors (1).

212144551 is an equidigital number, since it uses as much as digits as its factorization.

212144551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1600, while the sum is 25.

The square root of 212144551 is about 14565.1828344171. The cubic root of 212144551 is about 596.4086868189.

Adding to 212144551 its reverse (155441212), we get a palindrome (367585763).

The spelling of 212144551 in words is "two hundred twelve million, one hundred forty-four thousand, five hundred fifty-one".