47171031 has 12 divisors (see below), whose sum is σ = 63992952. Its totient is φ = 30907504.

The previous prime is 47171021. The next prime is 47171071. The reversal of 47171031 is 13017174.

It is not a de Polignac number, because 47171031 - 2²¹ = 45073879 is a prime.

It is a super-2 number, since 2×47171031² = 4450212331205922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 47170992 and 47171010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47171011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8185 + ... + 12701.

It is an arithmetic number, because the mean of its divisors is an integer number (5332746).

Almost surely, 2^47171031 is an apocalyptic number.

47171031 is a deficient number, since it is larger than the sum of its proper divisors (16821921).

47171031 is an equidigital number, since it uses as much as digits as its factorization.

47171031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4638 (or 4579 counting only the distinct ones).

The product of its (nonzero) digits is 588, while the sum is 24.

The square root of 47171031 is about 6868.1169908498. The cubic root of 47171031 is about 361.3198235903.

The spelling of 47171031 in words is "forty-seven million, one hundred seventy-one thousand, thirty-one".