47315885 has 4 divisors (see below), whose sum is σ = 56779068. Its totient is φ = 37852704.

The previous prime is 47315881. The next prime is 47315923. The reversal of 47315885 is 58851374.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58851374 = 2 ⋅29425687.

It can be written as a sum of positive squares in 2 ways, for example, as 15382084 + 31933801 = 3922^2 + 5651^2 .

It is a cyclic number.

It is not a de Polignac number, because 47315885 - 2² = 47315881 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47315881) 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 3 ways as a sum of consecutive naturals, for example, 4731584 + ... + 4731593.

It is an arithmetic number, because the mean of its divisors is an integer number (14194767).

Almost surely, 2^47315885 is an apocalyptic number.

It is an amenable number.

47315885 is a deficient number, since it is larger than the sum of its proper divisors (9463183).

47315885 is an equidigital number, since it uses as much as digits as its factorization.

47315885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9463182.

The product of its digits is 134400, while the sum is 41.

The square root of 47315885 is about 6878.6543015331. The cubic root of 47315885 is about 361.6892956834.

The spelling of 47315885 in words is "forty-seven million, three hundred fifteen thousand, eight hundred eighty-five".