165043420 has 24 divisors (see below), whose sum is σ = 347382000. Its totient is φ = 65866752.

The previous prime is 165043357. The next prime is 165043427. The reversal of 165043420 is 24340561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165043427) 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, 210 + ... + 18169.

It is an arithmetic number, because the mean of its divisors is an integer number (14474250).

Almost surely, 2^165043420 is an apocalyptic number.

165043420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165043420 is an abundant number, since it is smaller than the sum of its proper divisors (182338580).

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

165043420 is a wasteful number, since it uses less digits than its factorization.

165043420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18837 (or 18835 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 165043420 is about 12846.9225886980. The cubic root of 165043420 is about 548.5287621955.

Adding to 165043420 its reverse (24340561), we get a palindrome (189383981).

The spelling of 165043420 in words is "one hundred sixty-five million, forty-three thousand, four hundred twenty".