531144663 has 24 divisors (see below), whose sum is σ = 824862960. Its totient is φ = 303125760.

The previous prime is 531144637. The next prime is 531144667. The reversal of 531144663 is 366441135.

It is not a de Polignac number, because 531144663 - 2⁸ = 531144407 is a prime.

It is a super-2 number, since 2×531144663² = 564229306066767138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531144667) 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, 146533 + ... + 150113.

It is an arithmetic number, because the mean of its divisors is an integer number (34369290).

Almost surely, 2^531144663 is an apocalyptic number.

531144663 is a deficient number, since it is larger than the sum of its proper divisors (293718297).

531144663 is a wasteful number, since it uses less digits than its factorization.

531144663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4607 (or 4600 counting only the distinct ones).

The product of its digits is 25920, while the sum is 33.

The square root of 531144663 is about 23046.5759495852. The cubic root of 531144663 is about 809.8494172142.

Adding to 531144663 its reverse (366441135), we get a palindrome (897585798).

The spelling of 531144663 in words is "five hundred thirty-one million, one hundred forty-four thousand, six hundred sixty-three".