551225501 has 2 divisors, whose sum is σ = 551225502. Its totient is φ = 551225500.

The previous prime is 551225497. The next prime is 551225509. The reversal of 551225501 is 105522155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 480749476 + 70476025 = 21926^2 + 8395^2 .

It is a cyclic number.

It is not a de Polignac number, because 551225501 - 2² = 551225497 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551225509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275612750 + 275612751.

It is an arithmetic number, because the mean of its divisors is an integer number (275612751).

Almost surely, 2^551225501 is an apocalyptic number.

It is an amenable number.

551225501 is a deficient number, since it is larger than the sum of its proper divisors (1).

551225501 is an equidigital number, since it uses as much as digits as its factorization.

551225501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 551225501 is about 23478.1920300521. The cubic root of 551225501 is about 819.9293519344.

Adding to 551225501 its reverse (105522155), we get a palindrome (656747656).

It can be divided in two parts, 5512 and 25501, that added together give a palindrome (31013).

The spelling of 551225501 in words is "five hundred fifty-one million, two hundred twenty-five thousand, five hundred one".