220171397 has 2 divisors, whose sum is σ = 220171398. Its totient is φ = 220171396.

The previous prime is 220171351. The next prime is 220171409. The reversal of 220171397 is 793171022.

220171397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202749121 + 17422276 = 14239^2 + 4174^2 .

It is a cyclic number.

It is not a de Polignac number, because 220171397 - 2²⁰ = 219122821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220171327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110085698 + 110085699.

It is an arithmetic number, because the mean of its divisors is an integer number (110085699).

Almost surely, 2^220171397 is an apocalyptic number.

It is an amenable number.

220171397 is a deficient number, since it is larger than the sum of its proper divisors (1).

220171397 is an equidigital number, since it uses as much as digits as its factorization.

220171397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 220171397 is about 14838.1736409843. The cubic root of 220171397 is about 603.8378043865.

The spelling of 220171397 in words is "two hundred twenty million, one hundred seventy-one thousand, three hundred ninety-seven".