165140481 has 16 divisors (see below), whose sum is σ = 244145088. Its totient is φ = 98443200.

The previous prime is 165140473. The next prime is 165140489. The reversal of 165140481 is 184041561.

It is an interprime number because it is at equal distance from previous prime (165140473) and next prime (165140489).

It is not a de Polignac number, because 165140481 - 2³ = 165140473 is a prime.

It is a super-3 number, since 3×165140481³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (165140489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39006 + ... + 43031.

It is an arithmetic number, because the mean of its divisors is an integer number (15259068).

Almost surely, 2^165140481 is an apocalyptic number.

165140481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

165140481 is a deficient number, since it is larger than the sum of its proper divisors (79004607).

165140481 is a wasteful number, since it uses less digits than its factorization.

165140481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82112.

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 165140481 is about 12850.6996307594. The cubic root of 165140481 is about 548.6362698981.

The spelling of 165140481 in words is "one hundred sixty-five million, one hundred forty thousand, four hundred eighty-one".