505430531 has 8 divisors (see below), whose sum is σ = 523147680. Its totient is φ = 487732672.

The previous prime is 505430501. The next prime is 505430537. The reversal of 505430531 is 135034505.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 505430531 - 2²² = 501236227 is a prime.

It is a super-2 number, since 2×505430531² = 510920043333883922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 505430531.

It is not an unprimeable number, because it can be changed into a prime (505430537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66671 + ... + 73863.

It is an arithmetic number, because the mean of its divisors is an integer number (65393460).

Almost surely, 2^505430531 is an apocalyptic number.

505430531 is a deficient number, since it is larger than the sum of its proper divisors (17717149).

505430531 is a wasteful number, since it uses less digits than its factorization.

505430531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9645.

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 505430531 is about 22481.7822024856. The cubic root of 505430531 is about 796.5636621747.

The spelling of 505430531 in words is "five hundred five million, four hundred thirty thousand, five hundred thirty-one".