221525632516271 has 2 divisors, whose sum is σ = 221525632516272. Its totient is φ = 221525632516270.

The previous prime is 221525632516259. The next prime is 221525632516291. The reversal of 221525632516271 is 172615236525122.

221525632516271 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221525632516271 - 2³⁸ = 221250754609327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221525632516291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110762816258135 + 110762816258136.

It is an arithmetic number, because the mean of its divisors is an integer number (110762816258136).

Almost surely, 2^{221525632516271} is an apocalyptic number.

221525632516271 is a deficient number, since it is larger than the sum of its proper divisors (1).

221525632516271 is an equidigital number, since it uses as much as digits as its factorization.

221525632516271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024000, while the sum is 50.

The spelling of 221525632516271 in words is "two hundred twenty-one trillion, five hundred twenty-five billion, six hundred thirty-two million, five hundred sixteen thousand, two hundred seventy-one".