31530039489 has 81 divisors (see below), whose sum is σ = 51402807963. Its totient is φ = 18614703744.

The previous prime is 31530039487. The next prime is 31530039503. The reversal of 31530039489 is 98493003513.

The square root of 31530039489 is 177567.

It is a perfect power (a square), and thus also a powerful number.

31530039489 is a `hidden beast` number, since 3 + 1 + 530 + 0 + 39 + 4 + 89 = 666.

It can be written as a sum of positive squares in 13 ways, for example, as 30212349489 + 1317690000 = 173817^2 + 36300^2 .

It is not a de Polignac number, because 31530039489 - 2¹ = 31530039487 is a prime.

It is a super-2 number, since 2×31530039489² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31530039481) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 200828199 + ... + 200828355.

Almost surely, 2^31530039489 is an apocalyptic number.

31530039489 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

31530039489 is the 177567-th square number.

31530039489 is the 88784-th centered octagonal number.

It is an amenable number.

31530039489 is a deficient number, since it is larger than the sum of its proper divisors (19872768474).

31530039489 is a wasteful number, since it uses less digits than its factorization.

31530039489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The spelling of 31530039489 in words is "thirty-one billion, five hundred thirty million, thirty-nine thousand, four hundred eighty-nine".