331736161 has 2 divisors, whose sum is σ = 331736162. Its totient is φ = 331736160.

The previous prime is 331736123. The next prime is 331736179. The reversal of 331736161 is 161637133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 238517136 + 93219025 = 15444^2 + 9655^2 .

It is a cyclic number.

It is not a de Polignac number, because 331736161 - 2⁷ = 331736033 is a prime.

It is a super-2 number, since 2×331736161² = 220097761030035842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (331736101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165868080 + 165868081.

It is an arithmetic number, because the mean of its divisors is an integer number (165868081).

Almost surely, 2^331736161 is an apocalyptic number.

It is an amenable number.

331736161 is a deficient number, since it is larger than the sum of its proper divisors (1).

331736161 is an equidigital number, since it uses as much as digits as its factorization.

331736161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 31.

The square root of 331736161 is about 18213.6256961649. The cubic root of 331736161 is about 692.2520834463.

The spelling of 331736161 in words is "three hundred thirty-one million, seven hundred thirty-six thousand, one hundred sixty-one".