505531307 has 2 divisors, whose sum is σ = 505531308. Its totient is φ = 505531306.

The previous prime is 505531267. The next prime is 505531357. The reversal of 505531307 is 703135505.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505531307 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 505531307.

It is not a weakly prime, because it can be changed into another prime (505531357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252765653 + 252765654.

It is an arithmetic number, because the mean of its divisors is an integer number (252765654).

Almost surely, 2^505531307 is an apocalyptic number.

505531307 is a deficient number, since it is larger than the sum of its proper divisors (1).

505531307 is an equidigital number, since it uses as much as digits as its factorization.

505531307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7875, while the sum is 29.

The square root of 505531307 is about 22484.0233721636. The cubic root of 505531307 is about 796.6165999904.

The spelling of 505531307 in words is "five hundred five million, five hundred thirty-one thousand, three hundred seven".