165427831 has 2 divisors, whose sum is σ = 165427832. Its totient is φ = 165427830.

The previous prime is 165427793. The next prime is 165427849. The reversal of 165427831 is 138724561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165427831 - 2¹¹ = 165425783 is a prime.

It is a super-2 number, since 2×165427831² = 54732734538729122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165427331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82713915 + 82713916.

It is an arithmetic number, because the mean of its divisors is an integer number (82713916).

Almost surely, 2^165427831 is an apocalyptic number.

165427831 is a deficient number, since it is larger than the sum of its proper divisors (1).

165427831 is an equidigital number, since it uses as much as digits as its factorization.

165427831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 37.

The square root of 165427831 is about 12861.8750965790. The cubic root of 165427831 is about 548.9543007051.

The spelling of 165427831 in words is "one hundred sixty-five million, four hundred twenty-seven thousand, eight hundred thirty-one".