551940503 has 2 divisors, whose sum is σ = 551940504. Its totient is φ = 551940502.

The previous prime is 551940449. The next prime is 551940527. The reversal of 551940503 is 305049155.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 551940503 - 2⁸ = 551940247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 551940503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551940533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275970251 + 275970252.

It is an arithmetic number, because the mean of its divisors is an integer number (275970252).

Almost surely, 2^551940503 is an apocalyptic number.

551940503 is a deficient number, since it is larger than the sum of its proper divisors (1).

551940503 is an equidigital number, since it uses as much as digits as its factorization.

551940503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13500, while the sum is 32.

The square root of 551940503 is about 23493.4140345757. The cubic root of 551940503 is about 820.2837125545.

Adding to 551940503 its reverse (305049155), we get a palindrome (856989658).

The spelling of 551940503 in words is "five hundred fifty-one million, nine hundred forty thousand, five hundred three".