220310161 has 2 divisors, whose sum is σ = 220310162. Its totient is φ = 220310160.

The previous prime is 220310141. The next prime is 220310171. The reversal of 220310161 is 161013022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183331600 + 36978561 = 13540^2 + 6081^2 .

It is a cyclic number.

It is not a de Polignac number, because 220310161 - 2⁷ = 220310033 is a prime.

It is not a weakly prime, because it can be changed into another prime (220310141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110155080 + 110155081.

It is an arithmetic number, because the mean of its divisors is an integer number (110155081).

Almost surely, 2^220310161 is an apocalyptic number.

It is an amenable number.

220310161 is a deficient number, since it is larger than the sum of its proper divisors (1).

220310161 is an equidigital number, since it uses as much as digits as its factorization.

220310161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 220310161 is about 14842.8488168545. The cubic root of 220310161 is about 603.9646348970.

Adding to 220310161 its reverse (161013022), we get a palindrome (381323183).

The spelling of 220310161 in words is "two hundred twenty million, three hundred ten thousand, one hundred sixty-one".