531520042542 has 16 divisors (see below), whose sum is σ = 1063088640720. Its totient is φ = 177165254912.

The previous prime is 531520042519. The next prime is 531520042631. The reversal of 531520042542 is 245240025135.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1880067 + ... + 2144222.

It is an arithmetic number, because the mean of its divisors is an integer number (66443040045).

Almost surely, 2^531520042542 is an apocalyptic number.

531520042542 is an abundant number, since it is smaller than the sum of its proper divisors (531568598178).

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

531520042542 is a wasteful number, since it uses less digits than its factorization.

531520042542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4046307.

The product of its (nonzero) digits is 48000, while the sum is 33.

Adding to 531520042542 its reverse (245240025135), we get a palindrome (776760067677).

The spelling of 531520042542 in words is "five hundred thirty-one billion, five hundred twenty million, forty-two thousand, five hundred forty-two".