531142887 has 16 divisors (see below), whose sum is σ = 806162688. Its totient is φ = 307908480.

The previous prime is 531142877. The next prime is 531142897. The reversal of 531142887 is 788241135.

It is an interprime number because it is at equal distance from previous prime (531142877) and next prime (531142897).

It is not a de Polignac number, because 531142887 - 2⁸ = 531142631 is a prime.

It is a super-2 number, since 2×531142887² = 564225532821389538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531142867) 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, 349138 + ... + 350655.

It is an arithmetic number, because the mean of its divisors is an integer number (50385168).

Almost surely, 2^531142887 is an apocalyptic number.

531142887 is a deficient number, since it is larger than the sum of its proper divisors (275019801).

531142887 is a wasteful number, since it uses less digits than its factorization.

531142887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699830.

The product of its digits is 53760, while the sum is 39.

The square root of 531142887 is about 23046.5374188836. The cubic root of 531142887 is about 809.8485145762.

The spelling of 531142887 in words is "five hundred thirty-one million, one hundred forty-two thousand, eight hundred eighty-seven".