212424551 has 2 divisors, whose sum is σ = 212424552. Its totient is φ = 212424550.

The previous prime is 212424539. The next prime is 212424559. The reversal of 212424551 is 155424212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212424551 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212424551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212424559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106212275 + 106212276.

It is an arithmetic number, because the mean of its divisors is an integer number (106212276).

Almost surely, 2^212424551 is an apocalyptic number.

212424551 is a deficient number, since it is larger than the sum of its proper divisors (1).

212424551 is an equidigital number, since it uses as much as digits as its factorization.

212424551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3200, while the sum is 26.

The square root of 212424551 is about 14574.7916280131. The cubic root of 212424551 is about 596.6709624165.

Adding to 212424551 its reverse (155424212), we get a palindrome (367848763).

The spelling of 212424551 in words is "two hundred twelve million, four hundred twenty-four thousand, five hundred fifty-one".