505555031 has 2 divisors, whose sum is σ = 505555032. Its totient is φ = 505555030.

The previous prime is 505554989. The next prime is 505555033. The reversal of 505555031 is 130555505.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 505555031 - 2¹⁴ = 505538647 is a prime.

It is a super-2 number, since 2×505555031² = 511171778738821922, which contains 22 as substring.

Together with 505555033, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 505554985 and 505555003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505555033) 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, 252777515 + 252777516.

It is an arithmetic number, because the mean of its divisors is an integer number (252777516).

Almost surely, 2^505555031 is an apocalyptic number.

505555031 is a deficient number, since it is larger than the sum of its proper divisors (1).

505555031 is an equidigital number, since it uses as much as digits as its factorization.

505555031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9375, while the sum is 29.

The square root of 505555031 is about 22484.5509405903. The cubic root of 505555031 is about 796.6290612276.

The spelling of 505555031 in words is "five hundred five million, five hundred fifty-five thousand, thirty-one".