47591561 has 4 divisors (see below), whose sum is σ = 50096400. Its totient is φ = 45086724.

The previous prime is 47591549. The next prime is 47591563. The reversal of 47591561 is 16519574.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16519574 = 2 ⋅8259787.

It is a cyclic number.

It is not a de Polignac number, because 47591561 - 2²² = 43397257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47591563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1252391 + ... + 1252428.

It is an arithmetic number, because the mean of its divisors is an integer number (12524100).

Almost surely, 2^47591561 is an apocalyptic number.

It is an amenable number.

47591561 is a deficient number, since it is larger than the sum of its proper divisors (2504839).

47591561 is a wasteful number, since it uses less digits than its factorization.

47591561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2504838.

The product of its digits is 37800, while the sum is 38.

The square root of 47591561 is about 6898.6637111835. The cubic root of 47591561 is about 362.3903712881.

The spelling of 47591561 in words is "forty-seven million, five hundred ninety-one thousand, five hundred sixty-one".