243013861 has 16 divisors (see below), whose sum is σ = 265334400. Its totient is φ = 221695488.

The previous prime is 243013843. The next prime is 243013871. The reversal of 243013861 is 168310342.

It is a cyclic number.

It is not a de Polignac number, because 243013861 - 2¹⁷ = 242882789 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 (243013811) 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, 71560 + ... + 74878.

It is an arithmetic number, because the mean of its divisors is an integer number (16583400).

Almost surely, 2^243013861 is an apocalyptic number.

It is an amenable number.

243013861 is a deficient number, since it is larger than the sum of its proper divisors (22320539).

243013861 is a wasteful number, since it uses less digits than its factorization.

243013861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3468.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 243013861 is about 15588.9018535624. The cubic root of 243013861 is about 624.0370117278.

The spelling of 243013861 in words is "two hundred forty-three million, thirteen thousand, eight hundred sixty-one".