202843045161 has 27 divisors (see below), whose sum is σ = 311279613463. Its totient is φ = 127259655360.

The previous prime is 202843045133. The next prime is 202843045169. The reversal of 202843045161 is 161540348202.

It is a happy number.

The square root of 202843045161 is 450381.

It is a perfect power (a square), and thus also a powerful number.

202843045161 is a `hidden beast` number, since 2 + 0 + 28 + 430 + 45 + 161 = 666.

It can be written as a sum of positive squares in only one way, i.e., 157922786025 + 44920259136 = 397395^2 + 211944^2 .

It is not a de Polignac number, because 202843045161 - 2⁷ = 202843045033 is a prime.

It is a super-2 number, since 2×202843045161² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202843045169) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 22965016 + ... + 22973846.

Almost surely, 2^202843045161 is an apocalyptic number.

202843045161 is the 450381-st square number.

202843045161 is the 225191-st centered octagonal number.

It is an amenable number.

202843045161 is a deficient number, since it is larger than the sum of its proper divisors (108436568302).

202843045161 is an frugal number, since it uses more digits than its factorization.

202843045161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17702 (or 8851 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

Multiplying 202843045161 by its sum of digits (36), we get a square (7302349625796 = 2702286²).

The spelling of 202843045161 in words is "two hundred two billion, eight hundred forty-three million, forty-five thousand, one hundred sixty-one".