531999999999 has 48 divisors (see below), whose sum is σ = 877912412832. Its totient is φ = 307536943104.

The previous prime is 531999999991. The next prime is 532000000069. The reversal of 531999999999 is 999999999135.

It is not a de Polignac number, because 531999999999 - 2³ = 531999999991 is a prime.

531999999999 is a modest number, since divided by 999999 gives 531999 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531999999991) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 784539 + ... + 1295955.

It is an arithmetic number, because the mean of its divisors is an integer number (18289841934).

Almost surely, 2^531999999999 is an apocalyptic number.

531999999999 is a deficient number, since it is larger than the sum of its proper divisors (345912412833).

531999999999 is a wasteful number, since it uses less digits than its factorization.

531999999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511976 (or 511973 counting only the distinct ones).

The product of its digits is 5811307335, while the sum is 90.

The spelling of 531999999999 in words is "five hundred thirty-one billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".