165231345 has 8 divisors (see below), whose sum is σ = 264370176. Its totient is φ = 88123376.

The previous prime is 165231323. The next prime is 165231361. The reversal of 165231345 is 543132561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165231345 - 2⁶ = 165231281 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5507697 + ... + 5507726.

It is an arithmetic number, because the mean of its divisors is an integer number (33046272).

Almost surely, 2^165231345 is an apocalyptic number.

165231345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165231345 is a deficient number, since it is larger than the sum of its proper divisors (99138831).

165231345 is a wasteful number, since it uses less digits than its factorization.

165231345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11015431.

The product of its digits is 10800, while the sum is 30.

The square root of 165231345 is about 12854.2345162985. The cubic root of 165231345 is about 548.7368754461.

The spelling of 165231345 in words is "one hundred sixty-five million, two hundred thirty-one thousand, three hundred forty-five".