551123149 has 2 divisors, whose sum is σ = 551123150. Its totient is φ = 551123148.

The previous prime is 551123129. The next prime is 551123179. The reversal of 551123149 is 941321155.

551123149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 551075625 + 47524 = 23475^2 + 218^2 .

It is a cyclic number.

It is not a de Polignac number, because 551123149 - 2⁵ = 551123117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 551123149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551123129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275561574 + 275561575.

It is an arithmetic number, because the mean of its divisors is an integer number (275561575).

Almost surely, 2^551123149 is an apocalyptic number.

It is an amenable number.

551123149 is a deficient number, since it is larger than the sum of its proper divisors (1).

551123149 is an equidigital number, since it uses as much as digits as its factorization.

551123149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 31.

The square root of 551123149 is about 23476.0122039498. The cubic root of 551123149 is about 819.8786004098.

The spelling of 551123149 in words is "five hundred fifty-one million, one hundred twenty-three thousand, one hundred forty-nine".