210612161 has 2 divisors, whose sum is σ = 210612162. Its totient is φ = 210612160.

The previous prime is 210612139. The next prime is 210612163. The reversal of 210612161 is 161216012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121969936 + 88642225 = 11044^2 + 9415^2 .

It is a cyclic number.

It is not a de Polignac number, because 210612161 - 2⁶ = 210612097 is a prime.

It is a super-2 number, since 2×210612161² = 88714964722179842, which contains 22 as substring.

Together with 210612163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (210612163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105306080 + 105306081.

It is an arithmetic number, because the mean of its divisors is an integer number (105306081).

Almost surely, 2^210612161 is an apocalyptic number.

It is an amenable number.

210612161 is a deficient number, since it is larger than the sum of its proper divisors (1).

210612161 is an equidigital number, since it uses as much as digits as its factorization.

210612161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 210612161 is about 14512.4829371131. The cubic root of 210612161 is about 594.9691964375.

Adding to 210612161 its reverse (161216012), we get a palindrome (371828173).

The spelling of 210612161 in words is "two hundred ten million, six hundred twelve thousand, one hundred sixty-one".