505560031 has 2 divisors, whose sum is σ = 505560032. Its totient is φ = 505560030.

The previous prime is 505560007. The next prime is 505560049. The reversal of 505560031 is 130065505.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 505560031 - 2¹⁹ = 505035743 is a prime.

It is a super-2 number, since 2×505560031² = 511181889889441922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 505559978 and 505560005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505560061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252780015 + 252780016.

It is an arithmetic number, because the mean of its divisors is an integer number (252780016).

Almost surely, 2^505560031 is an apocalyptic number.

505560031 is a deficient number, since it is larger than the sum of its proper divisors (1).

505560031 is an equidigital number, since it uses as much as digits as its factorization.

505560031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 505560031 is about 22484.6621277706. The cubic root of 505560031 is about 796.6316874713.

The spelling of 505560031 in words is "five hundred five million, five hundred sixty thousand, thirty-one".