531242220144 has 40 divisors (see below), whose sum is σ = 1374779266432. Its totient is φ = 176770607040.

The previous prime is 531242220133. The next prime is 531242220181. The reversal of 531242220144 is 441022242135.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9663964 + ... + 9718779.

Almost surely, 2^531242220144 is an apocalyptic number.

It is an amenable number.

531242220144 is an abundant number, since it is smaller than the sum of its proper divisors (843537046288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

531242220144 is a wasteful number, since it uses less digits than its factorization.

531242220144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19383325 (or 19383319 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 531242220144 its reverse (441022242135), we get a palindrome (972264462279).

The spelling of 531242220144 in words is "five hundred thirty-one billion, two hundred forty-two million, two hundred twenty thousand, one hundred forty-four".