47531591 has 2 divisors, whose sum is σ = 47531592. Its totient is φ = 47531590.

The previous prime is 47531581. The next prime is 47531623. The reversal of 47531591 is 19513574.

47531591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 47531591 - 2¹⁸ = 47269447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47531531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23765795 + 23765796.

It is an arithmetic number, because the mean of its divisors is an integer number (23765796).

Almost surely, 2^47531591 is an apocalyptic number.

47531591 is a deficient number, since it is larger than the sum of its proper divisors (1).

47531591 is an equidigital number, since it uses as much as digits as its factorization.

47531591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18900, while the sum is 35.

The square root of 47531591 is about 6894.3158471309. The cubic root of 47531591 is about 362.2380915920.

The spelling of 47531591 in words is "forty-seven million, five hundred thirty-one thousand, five hundred ninety-one".