212340551 has 2 divisors, whose sum is σ = 212340552. Its totient is φ = 212340550.

The previous prime is 212340539. The next prime is 212340563. The reversal of 212340551 is 155043212.

It is a balanced prime because it is at equal distance from previous prime (212340539) and next prime (212340563).

It is a cyclic number.

It is not a de Polignac number, because 212340551 - 2¹⁸ = 212078407 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212340511) 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, 106170275 + 106170276.

It is an arithmetic number, because the mean of its divisors is an integer number (106170276).

Almost surely, 2^212340551 is an apocalyptic number.

212340551 is a deficient number, since it is larger than the sum of its proper divisors (1).

212340551 is an equidigital number, since it uses as much as digits as its factorization.

212340551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 212340551 is about 14571.9096552236. The cubic root of 212340551 is about 596.5923039493.

Adding to 212340551 its reverse (155043212), we get a palindrome (367383763).

The spelling of 212340551 in words is "two hundred twelve million, three hundred forty thousand, five hundred fifty-one".