652206161 has 2 divisors, whose sum is σ = 652206162. Its totient is φ = 652206160.

The previous prime is 652206157. The next prime is 652206199. The reversal of 652206161 is 161602256.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 400000000 + 252206161 = 20000^2 + 15881^2 .

It is a cyclic number.

It is not a de Polignac number, because 652206161 - 2² = 652206157 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_33902183 and since 652206161 and 33902183 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (652206131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326103080 + 326103081.

It is an arithmetic number, because the mean of its divisors is an integer number (326103081).

Almost surely, 2^652206161 is an apocalyptic number.

It is an amenable number.

652206161 is a deficient number, since it is larger than the sum of its proper divisors (1).

652206161 is an equidigital number, since it uses as much as digits as its factorization.

652206161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 652206161 is about 25538.3272944803. The cubic root of 652206161 is about 867.2180309253.

The spelling of 652206161 in words is "six hundred fifty-two million, two hundred six thousand, one hundred sixty-one".