361322161 has 2 divisors, whose sum is σ = 361322162. Its totient is φ = 361322160.

The previous prime is 361322153. The next prime is 361322173. The reversal of 361322161 is 161223163.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 238887936 + 122434225 = 15456^2 + 11065^2 .

It is an emirp because it is prime and its reverse (161223163) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 361322161 - 2³ = 361322153 is a prime.

It is not a weakly prime, because it can be changed into another prime (361322141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180661080 + 180661081.

It is an arithmetic number, because the mean of its divisors is an integer number (180661081).

Almost surely, 2^361322161 is an apocalyptic number.

It is an amenable number.

361322161 is a deficient number, since it is larger than the sum of its proper divisors (1).

361322161 is an equidigital number, since it uses as much as digits as its factorization.

361322161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 25.

The square root of 361322161 is about 19008.4760304449. The cubic root of 361322161 is about 712.2484831328.

The spelling of 361322161 in words is "three hundred sixty-one million, three hundred twenty-two thousand, one hundred sixty-one".