531394563 has 24 divisors (see below), whose sum is σ = 844315920. Its totient is φ = 296244480.

The previous prime is 531394561. The next prime is 531394571. The reversal of 531394563 is 365493135.

It is not a de Polignac number, because 531394563 - 2¹ = 531394561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (531394561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38058 + ... + 50111.

It is an arithmetic number, because the mean of its divisors is an integer number (35179830).

Almost surely, 2^531394563 is an apocalyptic number.

531394563 is a deficient number, since it is larger than the sum of its proper divisors (312921357).

531394563 is a wasteful number, since it uses less digits than its factorization.

531394563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88227 (or 88220 counting only the distinct ones).

The product of its digits is 145800, while the sum is 39.

The square root of 531394563 is about 23051.9969416968. The cubic root of 531394563 is about 809.9764068726.

The spelling of 531394563 in words is "five hundred thirty-one million, three hundred ninety-four thousand, five hundred sixty-three".