551125511 has 2 divisors, whose sum is σ = 551125512. Its totient is φ = 551125510.

The previous prime is 551125489. The next prime is 551125529. The reversal of 551125511 is 115521155.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551125511 is a prime.

It is a super-2 number, since 2×551125511² = 607478657750022242, which contains 22 as substring.

It is a Sophie Germain 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 (551121511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275562755 + 275562756.

It is an arithmetic number, because the mean of its divisors is an integer number (275562756).

Almost surely, 2^551125511 is an apocalyptic number.

551125511 is a deficient number, since it is larger than the sum of its proper divisors (1).

551125511 is an equidigital number, since it uses as much as digits as its factorization.

551125511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1250, while the sum is 26.

The square root of 551125511 is about 23476.0625105659. The cubic root of 551125511 is about 819.8797716849.

Adding to 551125511 its reverse (115521155), we get a palindrome (666646666).

The spelling of 551125511 in words is "five hundred fifty-one million, one hundred twenty-five thousand, five hundred eleven".