551011501 has 2 divisors, whose sum is σ = 551011502. Its totient is φ = 551011500.

The previous prime is 551011499. The next prime is 551011543. The reversal of 551011501 is 105110155.

It is a happy number.

551011501 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 497736100 + 53275401 = 22310^2 + 7299^2 .

It is a cyclic number.

It is not a de Polignac number, because 551011501 - 2¹ = 551011499 is a prime.

It is a super-2 number, since 2×551011501² = 607227348468546002, which contains 22 as substring.

Together with 551011499, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551011301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275505750 + 275505751.

It is an arithmetic number, because the mean of its divisors is an integer number (275505751).

Almost surely, 2^551011501 is an apocalyptic number.

It is an amenable number.

551011501 is a deficient number, since it is larger than the sum of its proper divisors (1).

551011501 is an equidigital number, since it uses as much as digits as its factorization.

551011501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 125, while the sum is 19.

The square root of 551011501 is about 23473.6341668690. The cubic root of 551011501 is about 819.8232322716.

Adding to 551011501 its reverse (105110155), we get a palindrome (656121656).

The spelling of 551011501 in words is "five hundred fifty-one million, eleven thousand, five hundred one".