47645571 has 4 divisors (see below), whose sum is σ = 63527432. Its totient is φ = 31763712.

The previous prime is 47645561. The next prime is 47645593. The reversal of 47645571 is 17554674.

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

It is not a de Polignac number, because 47645571 - 2¹⁴ = 47629187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47645501) 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, 7940926 + ... + 7940931.

It is an arithmetic number, because the mean of its divisors is an integer number (15881858).

Almost surely, 2^47645571 is an apocalyptic number.

47645571 is a deficient number, since it is larger than the sum of its proper divisors (15881861).

47645571 is a wasteful number, since it uses less digits than its factorization.

47645571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15881860.

The product of its digits is 117600, while the sum is 39.

The square root of 47645571 is about 6902.5771274213. The cubic root of 47645571 is about 362.5274075195.

The spelling of 47645571 in words is "forty-seven million, six hundred forty-five thousand, five hundred seventy-one".