165233420 has 24 divisors (see below), whose sum is σ = 378535248. Its totient is φ = 60084800.

The previous prime is 165233417. The next prime is 165233429. The reversal of 165233420 is 24332561.

It is a self number, because there is not a number n which added to its sum of digits gives 165233420.

It is not an unprimeable number, because it can be changed into a prime (165233429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 375311 + ... + 375750.

It is an arithmetic number, because the mean of its divisors is an integer number (15772302).

Almost surely, 2^165233420 is an apocalyptic number.

165233420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165233420 is an abundant number, since it is smaller than the sum of its proper divisors (213301828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165233420 is a wasteful number, since it uses less digits than its factorization.

165233420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751081 (or 751079 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 165233420 is about 12854.3152287471. The cubic root of 165233420 is about 548.7391724764.

Adding to 165233420 its reverse (24332561), we get a palindrome (189565981).

The spelling of 165233420 in words is "one hundred sixty-five million, two hundred thirty-three thousand, four hundred twenty".