531404142021504 has 96 divisors (see below), whose sum is σ = 1529175810052800. Its totient is φ = 177134130561024.

The previous prime is 531404142021457. The next prime is 531404142021509. The reversal of 531404142021504 is 405120241404135.

531404142021504 is a `hidden beast` number, since 5 + 3 + 1 + 4 + 0 + 4 + 142 + 0 + 2 + 1 + 504 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×531404142021504² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531404142021509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 482516977 + ... + 483617039.

It is an arithmetic number, because the mean of its divisors is an integer number (15928914688050).

Almost surely, 2^{531404142021504} is an apocalyptic number.

It is an amenable number.

531404142021504 is an abundant number, since it is smaller than the sum of its proper divisors (997771668031296).

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

531404142021504 is a wasteful number, since it uses less digits than its factorization.

531404142021504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1519412 (or 1519397 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

Adding to 531404142021504 its reverse (405120241404135), we get a palindrome (936524383425639).

The spelling of 531404142021504 in words is "five hundred thirty-one trillion, four hundred four billion, one hundred forty-two million, twenty-one thousand, five hundred four".