505411531 has 2 divisors, whose sum is σ = 505411532. Its totient is φ = 505411530.

The previous prime is 505411519. The next prime is 505411537. The reversal of 505411531 is 135114505.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 505411531 - 2⁹ = 505411019 is a prime.

It is a super-2 number, since 2×505411531² = 510881631335527922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 505411496 and 505411505.

It is not a weakly prime, because it can be changed into another prime (505411537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252705765 + 252705766.

It is an arithmetic number, because the mean of its divisors is an integer number (252705766).

Almost surely, 2^505411531 is an apocalyptic number.

505411531 is a deficient number, since it is larger than the sum of its proper divisors (1).

505411531 is an equidigital number, since it uses as much as digits as its factorization.

505411531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 505411531 is about 22481.3596341502. The cubic root of 505411531 is about 796.5536806518.

The spelling of 505411531 in words is "five hundred five million, four hundred eleven thousand, five hundred thirty-one".