551242129 has 2 divisors, whose sum is σ = 551242130. Its totient is φ = 551242128.

The previous prime is 551242099. The next prime is 551242147. The reversal of 551242129 is 921242155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 299290000 + 251952129 = 17300^2 + 15873^2 .

It is a cyclic number.

It is not a de Polignac number, because 551242129 - 2⁹ = 551241617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 551242129.

It is not a weakly prime, because it can be changed into another prime (551242729) 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, 275621064 + 275621065.

It is an arithmetic number, because the mean of its divisors is an integer number (275621065).

Almost surely, 2^551242129 is an apocalyptic number.

It is an amenable number.

551242129 is a deficient number, since it is larger than the sum of its proper divisors (1).

551242129 is an equidigital number, since it uses as much as digits as its factorization.

551242129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 31.

The square root of 551242129 is about 23478.5461432347. The cubic root of 551242129 is about 819.9375963814.

The spelling of 551242129 in words is "five hundred fifty-one million, two hundred forty-two thousand, one hundred twenty-nine".