220471697 has 2 divisors, whose sum is σ = 220471698. Its totient is φ = 220471696.

The previous prime is 220471663. The next prime is 220471723. The reversal of 220471697 is 796174022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200392336 + 20079361 = 14156^2 + 4481^2 .

It is a cyclic number.

It is not a de Polignac number, because 220471697 - 2²² = 216277393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220471697.

It is not a weakly prime, because it can be changed into another prime (220470697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110235848 + 110235849.

It is an arithmetic number, because the mean of its divisors is an integer number (110235849).

Almost surely, 2^220471697 is an apocalyptic number.

It is an amenable number.

220471697 is a deficient number, since it is larger than the sum of its proper divisors (1).

220471697 is an equidigital number, since it uses as much as digits as its factorization.

220471697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 38.

The square root of 220471697 is about 14848.2893627515. The cubic root of 220471697 is about 604.1122119852.

The spelling of 220471697 in words is "two hundred twenty million, four hundred seventy-one thousand, six hundred ninety-seven".