47861881 has 16 divisors (see below), whose sum is σ = 50675328. Its totient is φ = 45158400.

The previous prime is 47861857. The next prime is 47861899. The reversal of 47861881 is 18816874.

47861881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 47861881 - 2⁷ = 47861753 is a prime.

It is a super-2 number, since 2×47861881² = 4581519305716322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (47861081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186105 + ... + 186361.

It is an arithmetic number, because the mean of its divisors is an integer number (3167208).

Almost surely, 2^47861881 is an apocalyptic number.

It is an amenable number.

47861881 is a deficient number, since it is larger than the sum of its proper divisors (2813447).

47861881 is a wasteful number, since it uses less digits than its factorization.

47861881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432.

The product of its digits is 86016, while the sum is 43.

The square root of 47861881 is about 6918.2281691196. The cubic root of 47861881 is about 363.0752019087.

The spelling of 47861881 in words is "forty-seven million, eight hundred sixty-one thousand, eight hundred eighty-one".