47817081221 has 48 divisors (see below), whose sum is σ = 61681950720. Its totient is φ = 36254537280.

The previous prime is 47817081217. The next prime is 47817081223. The reversal of 47817081221 is 12218071874.

It is not a de Polignac number, because 47817081221 - 2² = 47817081217 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47817081223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3770990 + ... + 3783648.

It is an arithmetic number, because the mean of its divisors is an integer number (1285040640).

Almost surely, 2^47817081221 is an apocalyptic number.

It is an amenable number.

47817081221 is a deficient number, since it is larger than the sum of its proper divisors (13864869499).

47817081221 is a wasteful number, since it uses less digits than its factorization.

47817081221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12826 (or 12813 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 41.

The spelling of 47817081221 in words is "forty-seven billion, eight hundred seventeen million, eighty-one thousand, two hundred twenty-one".