551123249 has 2 divisors, whose sum is σ = 551123250. Its totient is φ = 551123248.

The previous prime is 551123219. The next prime is 551123267. The reversal of 551123249 is 942321155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 402283249 + 148840000 = 20057^2 + 12200^2 .

It is a cyclic number.

It is not a de Polignac number, because 551123249 - 2⁸ = 551122993 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (551123219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275561624 + 275561625.

It is an arithmetic number, because the mean of its divisors is an integer number (275561625).

Almost surely, 2^551123249 is an apocalyptic number.

It is an amenable number.

551123249 is a deficient number, since it is larger than the sum of its proper divisors (1).

551123249 is an equidigital number, since it uses as much as digits as its factorization.

551123249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 32.

The square root of 551123249 is about 23476.0143337833. The cubic root of 551123249 is about 819.8786499981.

The spelling of 551123249 in words is "five hundred fifty-one million, one hundred twenty-three thousand, two hundred forty-nine".