531016331987 has 2 divisors, whose sum is σ = 531016331988. Its totient is φ = 531016331986.

The previous prime is 531016331983. The next prime is 531016332037. The reversal of 531016331987 is 789133610135.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 531016331987 - 2² = 531016331983 is a prime.

It is not a weakly prime, because it can be changed into another prime (531016331983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265508165993 + 265508165994.

It is an arithmetic number, because the mean of its divisors is an integer number (265508165994).

Almost surely, 2^531016331987 is an apocalyptic number.

531016331987 is a deficient number, since it is larger than the sum of its proper divisors (1).

531016331987 is an equidigital number, since it uses as much as digits as its factorization.

531016331987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 47.

The spelling of 531016331987 in words is "five hundred thirty-one billion, sixteen million, three hundred thirty-one thousand, nine hundred eighty-seven".