47557 has 4 divisors (see below), whose sum is σ = 50080. Its totient is φ = 45036.

The previous prime is 47543. The next prime is 47563. The reversal of 47557 is 75574.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47557 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1233 + ... + 1270.

It is an arithmetic number, because the mean of its divisors is an integer number (12520).

2⁴⁷⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

47557 is a deficient number, since it is larger than the sum of its proper divisors (2523).

47557 is a wasteful number, since it uses less digits than its factorization.

47557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2522.

The product of its digits is 4900, while the sum is 28.

The square root of 47557 is about 218.0756749388. The cubic root of 47557 is about 36.2302627394.

The spelling of 47557 in words is "forty-seven thousand, five hundred fifty-seven".