165356143 has 6 divisors (see below), whose sum is σ = 165950864. Its totient is φ = 164763456.

The previous prime is 165356129. The next prime is 165356227. The reversal of 165356143 is 341653561.

It is not a de Polignac number, because 165356143 - 2⁵ = 165356111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165356099 and 165356108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165356743) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 123946 + ... + 125272.

Almost surely, 2^165356143 is an apocalyptic number.

165356143 is a deficient number, since it is larger than the sum of its proper divisors (594721).

165356143 is an frugal number, since it uses more digits than its factorization.

165356143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2033 (or 1680 counting only the distinct ones).

The product of its digits is 32400, while the sum is 34.

The square root of 165356143 is about 12859.0879536614. The cubic root of 165356143 is about 548.8749929658.

The spelling of 165356143 in words is "one hundred sixty-five million, three hundred fifty-six thousand, one hundred forty-three".