531118611021487 has 2 divisors, whose sum is σ = 531118611021488. Its totient is φ = 531118611021486.

The previous prime is 531118611021463. The next prime is 531118611021511. The reversal of 531118611021487 is 784120116811135.

It is a balanced prime because it is at equal distance from previous prime (531118611021463) and next prime (531118611021511).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531118611021487 is a prime.

It is a super-3 number, since 3×531118611021487³ (a number of 45 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 531118611021487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531118611024487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265559305510743 + 265559305510744.

It is an arithmetic number, because the mean of its divisors is an integer number (265559305510744).

Almost surely, 2^{531118611021487} is an apocalyptic number.

531118611021487 is a deficient number, since it is larger than the sum of its proper divisors (1).

531118611021487 is an equidigital number, since it uses as much as digits as its factorization.

531118611021487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 322560, while the sum is 49.

The spelling of 531118611021487 in words is "five hundred thirty-one trillion, one hundred eighteen billion, six hundred eleven million, twenty-one thousand, four hundred eighty-seven".