47671285457221 has 4 divisors (see below), whose sum is σ = 47671334345952. Its totient is φ = 47671236568492.

The previous prime is 47671285457177. The next prime is 47671285457239. The reversal of 47671285457221 is 12275458217674.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47671285457221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47671285457221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47671285457251) 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, 22951321 + ... + 24942046.

It is an arithmetic number, because the mean of its divisors is an integer number (11917833586488).

Almost surely, 2^{47671285457221} is an apocalyptic number.

It is an amenable number.

47671285457221 is a deficient number, since it is larger than the sum of its proper divisors (48888731).

47671285457221 is an equidigital number, since it uses as much as digits as its factorization.

47671285457221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48888730.

The product of its digits is 52684800, while the sum is 61.

The spelling of 47671285457221 in words is "forty-seven trillion, six hundred seventy-one billion, two hundred eighty-five million, four hundred fifty-seven thousand, two hundred twenty-one".