220625161 has 2 divisors, whose sum is σ = 220625162. Its totient is φ = 220625160.

The previous prime is 220625101. The next prime is 220625213. The reversal of 220625161 is 161526022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160655625 + 59969536 = 12675^2 + 7744^2 .

It is a cyclic number.

It is not a de Polignac number, because 220625161 - 2⁷ = 220625033 is a prime.

It is not a weakly prime, because it can be changed into another prime (220625101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110312580 + 110312581.

It is an arithmetic number, because the mean of its divisors is an integer number (110312581).

Almost surely, 2^220625161 is an apocalyptic number.

It is an amenable number.

220625161 is a deficient number, since it is larger than the sum of its proper divisors (1).

220625161 is an equidigital number, since it uses as much as digits as its factorization.

220625161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 220625161 is about 14853.4561971280. The cubic root of 220625161 is about 604.2523478473.

The spelling of 220625161 in words is "two hundred twenty million, six hundred twenty-five thousand, one hundred sixty-one".