551623141 has 2 divisors, whose sum is σ = 551623142. Its totient is φ = 551623140.

The previous prime is 551623139. The next prime is 551623153. The reversal of 551623141 is 141326155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 394221025 + 157402116 = 19855^2 + 12546^2 .

It is a cyclic number.

It is not a de Polignac number, because 551623141 - 2¹ = 551623139 is a prime.

Together with 551623139, 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 (551623441) 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, 275811570 + 275811571.

It is an arithmetic number, because the mean of its divisors is an integer number (275811571).

Almost surely, 2^551623141 is an apocalyptic number.

It is an amenable number.

551623141 is a deficient number, since it is larger than the sum of its proper divisors (1).

551623141 is an equidigital number, since it uses as much as digits as its factorization.

551623141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 28.

The square root of 551623141 is about 23486.6587874904. The cubic root of 551623141 is about 820.1264632438.

Adding to 551623141 its reverse (141326155), we get a palindrome (692949296).

The spelling of 551623141 in words is "five hundred fifty-one million, six hundred twenty-three thousand, one hundred forty-one".