47871681 has 32 divisors (see below), whose sum is σ = 75586560. Its totient is φ = 26568000.

The previous prime is 47871617. The next prime is 47871683. The reversal of 47871681 is 18617874.

It is a happy number.

It is not a de Polignac number, because 47871681 - 2⁶ = 47871617 is a prime.

It is a super-2 number, since 2×47871681² = 4583395683531522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (47871683) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64410 + ... + 65148.

It is an arithmetic number, because the mean of its divisors is an integer number (2362080).

Almost surely, 2^47871681 is an apocalyptic number.

It is an amenable number.

47871681 is a deficient number, since it is larger than the sum of its proper divisors (27714879).

47871681 is a wasteful number, since it uses less digits than its factorization.

47871681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917.

The product of its digits is 75264, while the sum is 42.

The square root of 47871681 is about 6918.9364067030. The cubic root of 47871681 is about 363.0999808078.

The spelling of 47871681 in words is "forty-seven million, eight hundred seventy-one thousand, six hundred eighty-one".