243355161 has 8 divisors (see below), whose sum is σ = 370826944. Its totient is φ = 139060080.

The previous prime is 243355141. The next prime is 243355199. The reversal of 243355161 is 161553342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243355161 - 2¹⁷ = 243224089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243355141) 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, 5794150 + ... + 5794191.

It is an arithmetic number, because the mean of its divisors is an integer number (46353368).

Almost surely, 2^243355161 is an apocalyptic number.

243355161 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

243355161 is a deficient number, since it is larger than the sum of its proper divisors (127471783).

243355161 is a wasteful number, since it uses less digits than its factorization.

243355161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11588351.

The product of its digits is 10800, while the sum is 30.

The square root of 243355161 is about 15599.8449030752. The cubic root of 243355161 is about 624.3290172960.

The spelling of 243355161 in words is "two hundred forty-three million, three hundred fifty-five thousand, one hundred sixty-one".