165801430 has 32 divisors (see below), whose sum is σ = 306633600. Its totient is φ = 64517760.

The previous prime is 165801367. The next prime is 165801431. The reversal of 165801430 is 34108561.

It is a super-2 number, since 2×165801430² = 54980228380089800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165801431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84096 + ... + 86044.

It is an arithmetic number, because the mean of its divisors is an integer number (9582300).

Almost surely, 2^165801430 is an apocalyptic number.

165801430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165801430 is a deficient number, since it is larger than the sum of its proper divisors (140832170).

165801430 is a wasteful number, since it uses less digits than its factorization.

165801430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2184.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 165801430 is about 12876.3904103596. The cubic root of 165801430 is about 549.3672392465.

Adding to 165801430 its reverse (34108561), we get a palindrome (199909991).

The spelling of 165801430 in words is "one hundred sixty-five million, eight hundred one thousand, four hundred thirty".