554243561 has 2 divisors, whose sum is σ = 554243562. Its totient is φ = 554243560.

The previous prime is 554243551. The next prime is 554243593. The reversal of 554243561 is 165342455.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 467381161 + 86862400 = 21619^2 + 9320^2 .

It is a cyclic number.

It is not a de Polignac number, because 554243561 - 2¹⁰ = 554242537 is a prime.

It is not a weakly prime, because it can be changed into another prime (554243551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 277121780 + 277121781.

It is an arithmetic number, because the mean of its divisors is an integer number (277121781).

Almost surely, 2^554243561 is an apocalyptic number.

It is an amenable number.

554243561 is a deficient number, since it is larger than the sum of its proper divisors (1).

554243561 is an equidigital number, since it uses as much as digits as its factorization.

554243561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72000, while the sum is 35.

The square root of 554243561 is about 23542.3779809942. The cubic root of 554243561 is about 821.4230499915.

It can be divided in two parts, 55424 and 3561, that added together give a palindrome (58985).

The spelling of 554243561 in words is "five hundred fifty-four million, two hundred forty-three thousand, five hundred sixty-one".