47156310221 has 2 divisors, whose sum is σ = 47156310222. Its totient is φ = 47156310220.

The previous prime is 47156310161. The next prime is 47156310239. The reversal of 47156310221 is 12201365174.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41963522500 + 5192787721 = 204850^2 + 72061^2 .

It is a cyclic number.

It is not a de Polignac number, because 47156310221 - 2¹⁴ = 47156293837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47156310241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23578155110 + 23578155111.

It is an arithmetic number, because the mean of its divisors is an integer number (23578155111).

Almost surely, 2^47156310221 is an apocalyptic number.

It is an amenable number.

47156310221 is a deficient number, since it is larger than the sum of its proper divisors (1).

47156310221 is an equidigital number, since it uses as much as digits as its factorization.

47156310221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

Adding to 47156310221 its reverse (12201365174), we get a palindrome (59357675395).

The spelling of 47156310221 in words is "forty-seven billion, one hundred fifty-six million, three hundred ten thousand, two hundred twenty-one".