47815 has 8 divisors (see below), whose sum is σ = 58608. Its totient is φ = 37440.

The previous prime is 47809. The next prime is 47819. The reversal of 47815 is 51874.

47815 is nontrivially palindromic in base 9.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 47815 - 2³ = 47807 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47815.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 300 + ... + 430.

It is an arithmetic number, because the mean of its divisors is an integer number (7326).

2⁴⁷⁸¹⁵ is an apocalyptic number.

47815 is a deficient number, since it is larger than the sum of its proper divisors (10793).

47815 is a wasteful number, since it uses less digits than its factorization.

47815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209.

The product of its digits is 1120, while the sum is 25.

The square root of 47815 is about 218.6664126015. Note that the first 3 decimals coincide. The cubic root of 47815 is about 36.2956618402.

The spelling of 47815 in words is "forty-seven thousand, eight hundred fifteen".