551520241 has 2 divisors, whose sum is σ = 551520242. Its totient is φ = 551520240.

The previous prime is 551520227. The next prime is 551520253. The reversal of 551520241 is 142025155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 474150625 + 77369616 = 21775^2 + 8796^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551520241 is a prime.

It is not a weakly prime, because it can be changed into another prime (551527241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275760120 + 275760121.

It is an arithmetic number, because the mean of its divisors is an integer number (275760121).

Almost surely, 2^551520241 is an apocalyptic number.

It is an amenable number.

551520241 is a deficient number, since it is larger than the sum of its proper divisors (1).

551520241 is an equidigital number, since it uses as much as digits as its factorization.

551520241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 551520241 is about 23484.4680799885. The cubic root of 551520241 is about 820.0754645004.

Adding to 551520241 its reverse (142025155), we get a palindrome (693545396).

The spelling of 551520241 in words is "five hundred fifty-one million, five hundred twenty thousand, two hundred forty-one".