531021113512 has 16 divisors (see below), whose sum is σ = 995818598100. Its totient is φ = 265469487360.

The previous prime is 531021113507. The next prime is 531021113531. The reversal of 531021113512 is 215311120135.

It can be written as a sum of positive squares in 2 ways, for example, as 530633574916 + 387538596 = 728446^2 + 19686^2 .

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 3 ways as a sum of consecutive naturals, for example, 5078689 + ... + 5182192.

Almost surely, 2^531021113512 is an apocalyptic number.

It is an amenable number.

531021113512 is a deficient number, since it is larger than the sum of its proper divisors (464797484588).

531021113512 is a wasteful number, since it uses less digits than its factorization.

531021113512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10267356 (or 10267352 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 25.

Adding to 531021113512 its reverse (215311120135), we get a palindrome (746332233647).

The spelling of 531021113512 in words is "five hundred thirty-one billion, twenty-one million, one hundred thirteen thousand, five hundred twelve".