165141819 has 12 divisors (see below), whose sum is σ = 239591976. Its totient is φ = 109608192.

The previous prime is 165141797. The next prime is 165141829. The reversal of 165141819 is 918141561.

It is a happy number.

It is not a de Polignac number, because 165141819 - 2¹¹ = 165139771 is a prime.

It is a super-2 number, since 2×165141819² = 54543640765257522, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (165141829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38374 + ... + 42459.

It is an arithmetic number, because the mean of its divisors is an integer number (19965998).

Almost surely, 2^165141819 is an apocalyptic number.

165141819 is a deficient number, since it is larger than the sum of its proper divisors (74450157).

165141819 is a wasteful number, since it uses less digits than its factorization.

165141819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81066 (or 81063 counting only the distinct ones).

The product of its digits is 8640, while the sum is 36.

The square root of 165141819 is about 12850.7516900763. The cubic root of 165141819 is about 548.6377516131.

The spelling of 165141819 in words is "one hundred sixty-five million, one hundred forty-one thousand, eight hundred nineteen".