531243344553 has 8 divisors (see below), whose sum is σ = 708548412768. Its totient is φ = 354050253024.

The previous prime is 531243344521. The next prime is 531243344557. The reversal of 531243344553 is 355443342135.

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

It is not a de Polignac number, because 531243344553 - 2⁵ = 531243344521 is a prime.

It is a super-2 number, since 2×531243344553² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (531243344557) 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, 27983100 + ... + 28002077.

It is an arithmetic number, because the mean of its divisors is an integer number (88568551596).

Almost surely, 2^531243344553 is an apocalyptic number.

It is an amenable number.

531243344553 is a deficient number, since it is larger than the sum of its proper divisors (177305068215).

531243344553 is a wasteful number, since it uses less digits than its factorization.

531243344553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55988343.

The product of its digits is 1296000, while the sum is 42.

Adding to 531243344553 its reverse (355443342135), we get a palindrome (886686686688).

The spelling of 531243344553 in words is "five hundred thirty-one billion, two hundred forty-three million, three hundred forty-four thousand, five hundred fifty-three".