165844331 has 4 divisors (see below), whose sum is σ = 174573000. Its totient is φ = 157115664.

The previous prime is 165844313. The next prime is 165844351. The reversal of 165844331 is 133448561.

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 165844331 - 2¹⁴ = 165827947 is a prime.

It is a super-2 number, since 2×165844331² = 55008684249675122, 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 = 165844291 and 165844300.

It is not an unprimeable number, because it can be changed into a prime (165844351) 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, 4364306 + ... + 4364343.

It is an arithmetic number, because the mean of its divisors is an integer number (43643250).

Almost surely, 2^165844331 is an apocalyptic number.

165844331 is a deficient number, since it is larger than the sum of its proper divisors (8728669).

165844331 is an equidigital number, since it uses as much as digits as its factorization.

165844331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8728668.

The product of its digits is 34560, while the sum is 35.

The square root of 165844331 is about 12878.0561809615. The cubic root of 165844331 is about 549.4146179521.

The spelling of 165844331 in words is "one hundred sixty-five million, eight hundred forty-four thousand, three hundred thirty-one".