551849761 has 2 divisors, whose sum is σ = 551849762. Its totient is φ = 551849760.

The previous prime is 551849743. The next prime is 551849773. The reversal of 551849761 is 167948155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 520980625 + 30869136 = 22825^2 + 5556^2 .

It is a cyclic number.

It is not a de Polignac number, because 551849761 - 2²⁵ = 518295329 is a prime.

It is not a weakly prime, because it can be changed into another prime (551849261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275924880 + 275924881.

It is an arithmetic number, because the mean of its divisors is an integer number (275924881).

Almost surely, 2^551849761 is an apocalyptic number.

It is an amenable number.

551849761 is a deficient number, since it is larger than the sum of its proper divisors (1).

551849761 is an equidigital number, since it uses as much as digits as its factorization.

551849761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 46.

The square root of 551849761 is about 23491.4827331099. The cubic root of 551849761 is about 820.2387570664.

The spelling of 551849761 in words is "five hundred fifty-one million, eight hundred forty-nine thousand, seven hundred sixty-one".