47143881 has 6 divisors (see below), whose sum is σ = 68096730. Its totient is φ = 31429248.

The previous prime is 47143849. The next prime is 47143897. The reversal of 47143881 is 18834174.

It can be written as a sum of positive squares in only one way, i.e., 42771600 + 4372281 = 6540^2 + 2091^2 .

It is not a de Polignac number, because 47143881 - 2⁵ = 47143849 is a prime.

It is a super-2 number, since 2×47143881² = 4445091031484322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (47143081) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2619096 + ... + 2619113.

It is an arithmetic number, because the mean of its divisors is an integer number (11349455).

Almost surely, 2^47143881 is an apocalyptic number.

It is an amenable number.

47143881 is a deficient number, since it is larger than the sum of its proper divisors (20952849).

47143881 is a wasteful number, since it uses less digits than its factorization.

47143881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5238215 (or 5238212 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 47143881 is about 6866.1401820819. The cubic root of 47143881 is about 361.2504892575.

The spelling of 47143881 in words is "forty-seven million, one hundred forty-three thousand, eight hundred eighty-one".