243982481 has 8 divisors (see below), whose sum is σ = 254632680. Its totient is φ = 233481472.

The previous prime is 243982469. The next prime is 243982489. The reversal of 243982481 is 184289342.

It can be written as a sum of positive squares in 4 ways, for example, as 1401856 + 242580625 = 1184^2 + 15575^2 .

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 243982481 - 2²⁶ = 176873617 is a prime.

It is a super-2 number, since 2×243982481² = 119054902069830722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (243982489) 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, 33950 + ... + 40503.

It is an arithmetic number, because the mean of its divisors is an integer number (31829085).

Almost surely, 2^243982481 is an apocalyptic number.

It is an amenable number.

243982481 is a deficient number, since it is larger than the sum of its proper divisors (10650199).

243982481 is a wasteful number, since it uses less digits than its factorization.

243982481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74595.

The product of its digits is 110592, while the sum is 41.

The square root of 243982481 is about 15619.9385722224. The cubic root of 243982481 is about 624.8650213046.

The spelling of 243982481 in words is "two hundred forty-three million, nine hundred eighty-two thousand, four hundred eighty-one".