551311361 has 2 divisors, whose sum is σ = 551311362. Its totient is φ = 551311360.

The previous prime is 551311333. The next prime is 551311367. The reversal of 551311361 is 163113155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 551310400 + 961 = 23480^2 + 31^2 .

It is a cyclic number.

It is not a de Polignac number, because 551311361 - 2¹⁴ = 551294977 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 551311361.

It is not a weakly prime, because it can be changed into another prime (551311367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275655680 + 275655681.

It is an arithmetic number, because the mean of its divisors is an integer number (275655681).

Almost surely, 2^551311361 is an apocalyptic number.

It is an amenable number.

551311361 is a deficient number, since it is larger than the sum of its proper divisors (1).

551311361 is an equidigital number, since it uses as much as digits as its factorization.

551311361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1350, while the sum is 26.

The square root of 551311361 is about 23480.0204642160. The cubic root of 551311361 is about 819.9719210096.

The spelling of 551311361 in words is "five hundred fifty-one million, three hundred eleven thousand, three hundred sixty-one".