47216131321 has 4 divisors (see below), whose sum is σ = 47264164992. Its totient is φ = 47168097652.

The previous prime is 47216131307. The next prime is 47216131337. The reversal of 47216131321 is 12313161274.

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-47216131321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47216131121) 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, 24015361 + ... + 24017326.

It is an arithmetic number, because the mean of its divisors is an integer number (11816041248).

Almost surely, 2^47216131321 is an apocalyptic number.

It is an amenable number.

47216131321 is a deficient number, since it is larger than the sum of its proper divisors (48033671).

47216131321 is an equidigital number, since it uses as much as digits as its factorization.

47216131321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48033670.

The product of its digits is 6048, while the sum is 31.

Adding to 47216131321 its reverse (12313161274), we get a palindrome (59529292595).

The spelling of 47216131321 in words is "forty-seven billion, two hundred sixteen million, one hundred thirty-one thousand, three hundred twenty-one".