243014021 has 4 divisors (see below), whose sum is σ = 253579872. Its totient is φ = 232448172.

The previous prime is 243013999. The next prime is 243014059. The reversal of 243014021 is 120410342.

243014021 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 a cyclic number.

It is not a de Polignac number, because 243014021 - 2¹⁴ = 242997637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243014221) 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, 5282891 + ... + 5282936.

It is an arithmetic number, because the mean of its divisors is an integer number (63394968).

Almost surely, 2^243014021 is an apocalyptic number.

It is an amenable number.

243014021 is a deficient number, since it is larger than the sum of its proper divisors (10565851).

243014021 is a wasteful number, since it uses less digits than its factorization.

243014021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10565850.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 243014021 is about 15588.9069854175. The cubic root of 243014021 is about 624.0371486828.

Adding to 243014021 its reverse (120410342), we get a palindrome (363424363).

The spelling of 243014021 in words is "two hundred forty-three million, fourteen thousand, twenty-one".