47991532531 has 2 divisors, whose sum is σ = 47991532532. Its totient is φ = 47991532530.

The previous prime is 47991532513. The next prime is 47991532553. The reversal of 47991532531 is 13523519974.

It is a happy number.

Together with previous prime (47991532513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47991532531 - 2⁷ = 47991532403 is a prime.

It is a super-3 number, since 3×47991532531³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (47991532591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23995766265 + 23995766266.

It is an arithmetic number, because the mean of its divisors is an integer number (23995766266).

Almost surely, 2^47991532531 is an apocalyptic number.

47991532531 is a deficient number, since it is larger than the sum of its proper divisors (1).

47991532531 is an equidigital number, since it uses as much as digits as its factorization.

47991532531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1020600, while the sum is 49.

The spelling of 47991532531 in words is "forty-seven billion, nine hundred ninety-one million, five hundred thirty-two thousand, five hundred thirty-one".