165832381 has 32 divisors (see below), whose sum is σ = 201801600. Its totient is φ = 134265600.

The previous prime is 165832379. The next prime is 165832397. The reversal of 165832381 is 183238561.

It is a cyclic number.

It is not a de Polignac number, because 165832381 - 2¹ = 165832379 is a prime.

It is a super-2 number, since 2×165832381² = 55000757176258322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 165832381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165832351) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 916111 + ... + 916291.

It is an arithmetic number, because the mean of its divisors is an integer number (6306300).

Almost surely, 2^165832381 is an apocalyptic number.

165832381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

165832381 is a deficient number, since it is larger than the sum of its proper divisors (35969219).

165832381 is a wasteful number, since it uses less digits than its factorization.

165832381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397.

The product of its digits is 34560, while the sum is 37.

The square root of 165832381 is about 12877.5922050669. The cubic root of 165832381 is about 549.4014215160.

The spelling of 165832381 in words is "one hundred sixty-five million, eight hundred thirty-two thousand, three hundred eighty-one".