165546331 has 2 divisors, whose sum is σ = 165546332. Its totient is φ = 165546330.

The previous prime is 165546307. The next prime is 165546343. The reversal of 165546331 is 133645561.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 165546331 - 2⁹ = 165545819 is a prime.

It is a super-2 number, since 2×165546331² = 54811175415123122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (165546631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82773165 + 82773166.

It is an arithmetic number, because the mean of its divisors is an integer number (82773166).

Almost surely, 2^165546331 is an apocalyptic number.

165546331 is a deficient number, since it is larger than the sum of its proper divisors (1).

165546331 is an equidigital number, since it uses as much as digits as its factorization.

165546331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 34.

The square root of 165546331 is about 12866.4809097126. The cubic root of 165546331 is about 549.0853458822.

The spelling of 165546331 in words is "one hundred sixty-five million, five hundred forty-six thousand, three hundred thirty-one".