165620143 has 8 divisors (see below), whose sum is σ = 178464608. Its totient is φ = 152790624.

The previous prime is 165620141. The next prime is 165620167. The reversal of 165620143 is 341026561.

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 165620143 - 2¹ = 165620141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165620141) 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, 32005 + ... + 36817.

It is an arithmetic number, because the mean of its divisors is an integer number (22308076).

Almost surely, 2^165620143 is an apocalyptic number.

165620143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

165620143 is a deficient number, since it is larger than the sum of its proper divisors (12844465).

165620143 is a wasteful number, since it uses less digits than its factorization.

165620143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7473.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 165620143 is about 12869.3489734330. The cubic root of 165620143 is about 549.1669404933.

The spelling of 165620143 in words is "one hundred sixty-five million, six hundred twenty thousand, one hundred forty-three".