505005505531 has 2 divisors, whose sum is σ = 505005505532. Its totient is φ = 505005505530.

The previous prime is 505005505517. The next prime is 505005505561. The reversal of 505005505531 is 135505500505.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505005505531 is a prime.

It is a super-2 number, since 2×505005505531² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (505005505561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252502752765 + 252502752766.

It is an arithmetic number, because the mean of its divisors is an integer number (252502752766).

Almost surely, 2^505005505531 is an apocalyptic number.

505005505531 is a deficient number, since it is larger than the sum of its proper divisors (1).

505005505531 is an equidigital number, since it uses as much as digits as its factorization.

505005505531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46875, while the sum is 34.

The spelling of 505005505531 in words is "five hundred five billion, five million, five hundred five thousand, five hundred thirty-one".