47032731 has 20 divisors (see below), whose sum is σ = 70508152. Its totient is φ = 31243968.

The previous prime is 47032721. The next prime is 47032753. The reversal of 47032731 is 13723074.

It is not a de Polignac number, because 47032731 - 2¹⁵ = 46999963 is a prime.

It is a super-2 number, since 2×47032731² = 4424155570636722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 47032695 and 47032704.

It is not an unprimeable number, because it can be changed into a prime (47032721) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 26436 + ... + 28158.

Almost surely, 2^47032731 is an apocalyptic number.

47032731 is a deficient number, since it is larger than the sum of its proper divisors (23475421).

47032731 is a wasteful number, since it uses less digits than its factorization.

47032731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2072 (or 2063 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 47032731 is about 6858.0413384581. The cubic root of 47032731 is about 360.9663619693.

The spelling of 47032731 in words is "forty-seven million, thirty-two thousand, seven hundred thirty-one".