531243402042 has 32 divisors (see below), whose sum is σ = 1072714591872. Its totient is φ = 175382475264.

The previous prime is 531243402031. The next prime is 531243402073. The reversal of 531243402042 is 240204342135.

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 15 ways as a sum of consecutive naturals, for example, 390358 + ... + 1102209.

It is an arithmetic number, because the mean of its divisors is an integer number (33522330996).

Almost surely, 2^531243402042 is an apocalyptic number.

531243402042 is an abundant number, since it is smaller than the sum of its proper divisors (541471189830).

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

531243402042 is a wasteful number, since it uses less digits than its factorization.

531243402042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493142.

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 531243402042 its reverse (240204342135), we get a palindrome (771447744177).

The spelling of 531243402042 in words is "five hundred thirty-one billion, two hundred forty-three million, four hundred two thousand, forty-two".