171443420 has 24 divisors (see below), whose sum is σ = 364966224. Its totient is φ = 67637376.

The previous prime is 171443417. The next prime is 171443431. The reversal of 171443420 is 24344171.

It is a super-2 number, since 2×171443420² = 58785692522592800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 171443420.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57254 + ... + 60173.

It is an arithmetic number, because the mean of its divisors is an integer number (15206926).

Almost surely, 2^171443420 is an apocalyptic number.

171443420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

171443420 is an abundant number, since it is smaller than the sum of its proper divisors (193522804).

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

171443420 is a wasteful number, since it uses less digits than its factorization.

171443420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117509 (or 117507 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 171443420 is about 13093.6404410691. The cubic root of 171443420 is about 555.5292627260.

Adding to 171443420 its reverse (24344171), we get a palindrome (195787591).

The spelling of 171443420 in words is "one hundred seventy-one million, four hundred forty-three thousand, four hundred twenty".