531515444442 has 16 divisors (see below), whose sum is σ = 1063593659520. Its totient is φ = 177078019712.

The previous prime is 531515444441. The next prime is 531515444459. The reversal of 531515444442 is 244444515135.

It is a junction number, because it is equal to n+sod(n) for n = 531515444394 and 531515444403.

It is not an unprimeable number, because it can be changed into a prime (531515444441) by changing a digit.

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, 23436498 + ... + 23459165.

It is an arithmetic number, because the mean of its divisors is an integer number (66474603720).

Almost surely, 2^531515444442 is an apocalyptic number.

531515444442 is an abundant number, since it is smaller than the sum of its proper divisors (532078215078).

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

531515444442 is a wasteful number, since it uses less digits than its factorization.

531515444442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46897557.

The product of its digits is 768000, while the sum is 42.

Adding to 531515444442 its reverse (244444515135), we get a palindrome (775959959577).

The spelling of 531515444442 in words is "five hundred thirty-one billion, five hundred fifteen million, four hundred forty-four thousand, four hundred forty-two".