531540117 has 16 divisors (see below), whose sum is σ = 787927680. Its totient is φ = 354152736.

The previous prime is 531540091. The next prime is 531540131. The reversal of 531540117 is 711045135.

531540117 is a `hidden beast` number, since 5 + 3 + 1 + 540 + 117 = 666.

It is not a de Polignac number, because 531540117 - 2⁷ = 531539989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531540197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51633 + ... + 61065.

It is an arithmetic number, because the mean of its divisors is an integer number (49245480).

Almost surely, 2^531540117 is an apocalyptic number.

It is an amenable number.

531540117 is a deficient number, since it is larger than the sum of its proper divisors (256387563).

531540117 is a wasteful number, since it uses less digits than its factorization.

531540117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11529 (or 11523 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 531540117 is about 23055.1538056028. The cubic root of 531540117 is about 810.0503535227.

The spelling of 531540117 in words is "five hundred thirty-one million, five hundred forty thousand, one hundred seventeen".