243348981 has 16 divisors (see below), whose sum is σ = 338022720. Its totient is φ = 155588480.

The previous prime is 243348971. The next prime is 243348991. The reversal of 243348981 is 189843342.

It is an interprime number because it is at equal distance from previous prime (243348971) and next prime (243348991).

It is a cyclic number.

It is not a de Polignac number, because 243348981 - 2¹⁰ = 243347957 is a prime.

It is a super-2 number, since 2×243348981² = 118437453107476722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243348961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9510 + ... + 24023.

It is an arithmetic number, because the mean of its divisors is an integer number (21126420).

Almost surely, 2^243348981 is an apocalyptic number.

It is an amenable number.

243348981 is a deficient number, since it is larger than the sum of its proper divisors (94673739).

243348981 is a wasteful number, since it uses less digits than its factorization.

243348981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33636.

The product of its digits is 165888, while the sum is 42.

The square root of 243348981 is about 15599.6468229252. The cubic root of 243348981 is about 624.3237323098.

The spelling of 243348981 in words is "two hundred forty-three million, three hundred forty-eight thousand, nine hundred eighty-one".