47131730 has 16 divisors (see below), whose sum is σ = 85791960. Its totient is φ = 18640512.

The previous prime is 47131697. The next prime is 47131789. The reversal of 47131730 is 3713174.

47131730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 15062161 + 32069569 = 3881^2 + 5663^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 47131730.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 25589 + ... + 27368.

Almost surely, 2^47131730 is an apocalyptic number.

47131730 is a deficient number, since it is larger than the sum of its proper divisors (38660230).

47131730 is a wasteful number, since it uses less digits than its factorization.

47131730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53053.

The product of its (nonzero) digits is 1764, while the sum is 26.

The square root of 47131730 is about 6865.2552756616. The cubic root of 47131730 is about 361.2194500093.

The spelling of 47131730 in words is "forty-seven million, one hundred thirty-one thousand, seven hundred thirty".