1331320171 has 2 divisors, whose sum is σ = 1331320172. Its totient is φ = 1331320170.

The previous prime is 1331320163. The next prime is 1331320231. The reversal of 1331320171 is 1710231331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1331320171 - 2³ = 1331320163 is a prime.

It is a super-2 number, since 2×1331320171² = 3544826795422938482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1331320271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665660085 + 665660086.

It is an arithmetic number, because the mean of its divisors is an integer number (665660086).

Almost surely, 2^1331320171 is an apocalyptic number.

1331320171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331320171 is an equidigital number, since it uses as much as digits as its factorization.

1331320171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 1331320171 is about 36487.2603931838. The cubic root of 1331320171 is about 1100.0881943061.

The spelling of 1331320171 in words is "one billion, three hundred thirty-one million, three hundred twenty thousand, one hundred seventy-one".