551105623 has 2 divisors, whose sum is σ = 551105624. Its totient is φ = 551105622.

The previous prime is 551105573. The next prime is 551105629. The reversal of 551105623 is 326501155.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 551105623 - 2⁹ = 551105111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 551105591 and 551105600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551105629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275552811 + 275552812.

It is an arithmetic number, because the mean of its divisors is an integer number (275552812).

Almost surely, 2^551105623 is an apocalyptic number.

551105623 is a deficient number, since it is larger than the sum of its proper divisors (1).

551105623 is an equidigital number, since it uses as much as digits as its factorization.

551105623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 551105623 is about 23475.6389263423. The cubic root of 551105623 is about 819.8699094637.

Adding to 551105623 its reverse (326501155), we get a palindrome (877606778).

The spelling of 551105623 in words is "five hundred fifty-one million, one hundred five thousand, six hundred twenty-three".