531145563 has 8 divisors (see below), whose sum is σ = 762670608. Its totient is φ = 326858784.

The previous prime is 531145541. The next prime is 531145579. The reversal of 531145563 is 365541135.

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

It is not a de Polignac number, because 531145563 - 2⁶ = 531145499 is a prime.

It is a super-3 number, since 3×531145563³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (531145763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6809520 + ... + 6809597.

It is an arithmetic number, because the mean of its divisors is an integer number (95333826).

Almost surely, 2^531145563 is an apocalyptic number.

531145563 is a deficient number, since it is larger than the sum of its proper divisors (231525045).

531145563 is a wasteful number, since it uses less digits than its factorization.

531145563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13619133.

The product of its digits is 27000, while the sum is 33.

The square root of 531145563 is about 23046.5954752540. The cubic root of 531145563 is about 809.8498746314.

Adding to 531145563 its reverse (365541135), we get a palindrome (896686698).

The spelling of 531145563 in words is "five hundred thirty-one million, one hundred forty-five thousand, five hundred sixty-three".