165446131 has 4 divisors (see below), whose sum is σ = 171151200. Its totient is φ = 159741064.

The previous prime is 165446123. The next prime is 165446137. The reversal of 165446131 is 131644561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 165446131 - 2³ = 165446123 is a prime.

It is a super-2 number, since 2×165446131² = 54744844525738322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165446093 and 165446102.

It is not an unprimeable number, because it can be changed into a prime (165446137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2852491 + ... + 2852548.

It is an arithmetic number, because the mean of its divisors is an integer number (42787800).

Almost surely, 2^165446131 is an apocalyptic number.

165446131 is a deficient number, since it is larger than the sum of its proper divisors (5705069).

165446131 is an equidigital number, since it uses as much as digits as its factorization.

165446131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5705068.

The product of its digits is 8640, while the sum is 31.

The square root of 165446131 is about 12862.5864817306. The cubic root of 165446131 is about 548.9745421466.

The spelling of 165446131 in words is "one hundred sixty-five million, four hundred forty-six thousand, one hundred thirty-one".