47202828181 has 4 divisors (see below), whose sum is σ = 48478580332. Its totient is φ = 45927076032.

The previous prime is 47202828173. The next prime is 47202828191. The reversal of 47202828181 is 18182820274.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18182820274 = 2 ⋅9091410137.

It can be written as a sum of positive squares in 2 ways, for example, as 43946413956 + 3256414225 = 209634^2 + 57065^2 .

It is a cyclic number.

It is not a de Polignac number, because 47202828181 - 2³ = 47202828173 is a prime.

It is a super-2 number, since 2×47202828181² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47202828151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637876020 + ... + 637876093.

It is an arithmetic number, because the mean of its divisors is an integer number (12119645083).

Almost surely, 2^47202828181 is an apocalyptic number.

It is an amenable number.

47202828181 is a deficient number, since it is larger than the sum of its proper divisors (1275752151).

47202828181 is a wasteful number, since it uses less digits than its factorization.

47202828181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275752150.

The product of its (nonzero) digits is 114688, while the sum is 43.

The spelling of 47202828181 in words is "forty-seven billion, two hundred two million, eight hundred twenty-eight thousand, one hundred eighty-one".