243865061 has 4 divisors (see below), whose sum is σ = 266034624. Its totient is φ = 221695500.

The previous prime is 243865043. The next prime is 243865079. The reversal of 243865061 is 160568342.

243865061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (243865043) and next prime (243865079).

It is a cyclic number.

It is not a de Polignac number, because 243865061 - 2¹⁰ = 243864037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243861061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11084765 + ... + 11084786.

It is an arithmetic number, because the mean of its divisors is an integer number (66508656).

Almost surely, 2^243865061 is an apocalyptic number.

It is an amenable number.

243865061 is a deficient number, since it is larger than the sum of its proper divisors (22169563).

243865061 is a wasteful number, since it uses less digits than its factorization.

243865061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22169562.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 243865061 is about 15616.1794623397. The cubic root of 243865061 is about 624.7647635265.

The spelling of 243865061 in words is "two hundred forty-three million, eight hundred sixty-five thousand, sixty-one".