165341531 has 2 divisors, whose sum is σ = 165341532. Its totient is φ = 165341530.

The previous prime is 165341521. The next prime is 165341581. The reversal of 165341531 is 135143561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165341531 - 2¹⁰ = 165340507 is a prime.

It is a super-2 number, since 2×165341531² = 54675643746847922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 165341494 and 165341503.

It is not a weakly prime, because it can be changed into another prime (165341521) 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, 82670765 + 82670766.

It is an arithmetic number, because the mean of its divisors is an integer number (82670766).

Almost surely, 2^165341531 is an apocalyptic number.

165341531 is a deficient number, since it is larger than the sum of its proper divisors (1).

165341531 is an equidigital number, since it uses as much as digits as its factorization.

165341531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 29.

The square root of 165341531 is about 12858.5197826188. The cubic root of 165341531 is about 548.8588250398.

The spelling of 165341531 in words is "one hundred sixty-five million, three hundred forty-one thousand, five hundred thirty-one".