47210577721 has 2 divisors, whose sum is σ = 47210577722. Its totient is φ = 47210577720.

The previous prime is 47210577679. The next prime is 47210577793. The reversal of 47210577721 is 12777501274.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38386605625 + 8823972096 = 195925^2 + 93936^2 .

It is a cyclic number.

It is not a de Polignac number, because 47210577721 - 2²¹ = 47208480569 is a prime.

It is not a weakly prime, because it can be changed into another prime (47210578721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23605288860 + 23605288861.

It is an arithmetic number, because the mean of its divisors is an integer number (23605288861).

Almost surely, 2^47210577721 is an apocalyptic number.

It is an amenable number.

47210577721 is a deficient number, since it is larger than the sum of its proper divisors (1).

47210577721 is an equidigital number, since it uses as much as digits as its factorization.

47210577721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192080, while the sum is 43.

The spelling of 47210577721 in words is "forty-seven billion, two hundred ten million, five hundred seventy-seven thousand, seven hundred twenty-one".