47557147 has 4 divisors (see below), whose sum is σ = 51880536. Its totient is φ = 43233760.

The previous prime is 47557051. The next prime is 47557157. The reversal of 47557147 is 74175574.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47557147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47557157) 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, 2161678 + ... + 2161699.

It is an arithmetic number, because the mean of its divisors is an integer number (12970134).

Almost surely, 2^47557147 is an apocalyptic number.

47557147 is a deficient number, since it is larger than the sum of its proper divisors (4323389).

47557147 is a wasteful number, since it uses less digits than its factorization.

47557147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4323388.

The product of its digits is 137200, while the sum is 40.

The square root of 47557147 is about 6896.1690089498. The cubic root of 47557147 is about 362.3030006897.

The spelling of 47557147 in words is "forty-seven million, five hundred fifty-seven thousand, one hundred forty-seven".