512120551 has 2 divisors, whose sum is σ = 512120552. Its totient is φ = 512120550.

The previous prime is 512120549. The next prime is 512120561. The reversal of 512120551 is 155021215.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 512120551 - 2¹ = 512120549 is a prime.

Together with 512120549, 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 (512120501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256060275 + 256060276.

It is an arithmetic number, because the mean of its divisors is an integer number (256060276).

Almost surely, 2^512120551 is an apocalyptic number.

512120551 is a deficient number, since it is larger than the sum of its proper divisors (1).

512120551 is an equidigital number, since it uses as much as digits as its factorization.

512120551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 512120551 is about 22630.0806671121. The cubic root of 512120551 is about 800.0627820521.

Adding to 512120551 its reverse (155021215), we get a palindrome (667141766).

The spelling of 512120551 in words is "five hundred twelve million, one hundred twenty thousand, five hundred fifty-one".