47131209 has 24 divisors (see below), whose sum is σ = 72034560. Its totient is φ = 29633472.

The previous prime is 47131207. The next prime is 47131211. The reversal of 47131209 is 90213174.

47131209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (47131207) and next prime (47131211).

It is not a de Polignac number, because 47131209 - 2¹ = 47131207 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (47131207) 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 23 ways as a sum of consecutive naturals, for example, 13552 + ... + 16670.

It is an arithmetic number, because the mean of its divisors is an integer number (3001440).

Almost surely, 2^47131209 is an apocalyptic number.

It is an amenable number.

47131209 is a deficient number, since it is larger than the sum of its proper divisors (24903351).

47131209 is a wasteful number, since it uses less digits than its factorization.

47131209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3221 (or 3218 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 47131209 is about 6865.2173308643. The cubic root of 47131209 is about 361.2181190162.

The spelling of 47131209 in words is "forty-seven million, one hundred thirty-one thousand, two hundred nine".