47277578221 has 4 divisors (see below), whose sum is σ = 50058612252. Its totient is φ = 44496544192.

The previous prime is 47277578219. The next prime is 47277578237. The reversal of 47277578221 is 12287577274.

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 31147308196 + 16130270025 = 176486^2 + 127005^2 .

It is not a de Polignac number, because 47277578221 - 2¹ = 47277578219 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 (47277578261) 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, 1390516990 + ... + 1390517023.

It is an arithmetic number, because the mean of its divisors is an integer number (12514653063).

Almost surely, 2^47277578221 is an apocalyptic number.

It is an amenable number.

47277578221 is a deficient number, since it is larger than the sum of its proper divisors (2781034031).

47277578221 is a wasteful number, since it uses less digits than its factorization.

47277578221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2781034030.

The product of its digits is 3073280, while the sum is 52.

The spelling of 47277578221 in words is "forty-seven billion, two hundred seventy-seven million, five hundred seventy-eight thousand, two hundred twenty-one".