47828213 has 4 divisors (see below), whose sum is σ = 48483468. Its totient is φ = 47172960.

The previous prime is 47828203. The next prime is 47828237. The reversal of 47828213 is 31282874.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14915044 + 32913169 = 3862^2 + 5737^2 .

It is a cyclic number.

It is not a de Polignac number, because 47828213 - 2²⁰ = 46779637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47828203) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327518 + ... + 327663.

It is an arithmetic number, because the mean of its divisors is an integer number (12120867).

Almost surely, 2^47828213 is an apocalyptic number.

It is an amenable number.

47828213 is a deficient number, since it is larger than the sum of its proper divisors (655255).

47828213 is an equidigital number, since it uses as much as digits as its factorization.

47828213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655254.

The product of its digits is 21504, while the sum is 35.

The square root of 47828213 is about 6915.7944590625. The cubic root of 47828213 is about 362.9900479681.

The spelling of 47828213 in words is "forty-seven million, eight hundred twenty-eight thousand, two hundred thirteen".