243034070621 has 4 divisors (see below), whose sum is σ = 243038730912. Its totient is φ = 243029410332.

The previous prime is 243034070569. The next prime is 243034070647. The reversal of 243034070621 is 126070430342.

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, and also an emirpimes, since its reverse is a distinct semiprime: 126070430342 = 2 ⋅63035215171.

It is a cyclic number.

It is not a de Polignac number, because 243034070621 - 2⁶ = 243034070557 is a prime.

It is a super-2 number, since 2×243034070621² (a number of 24 digits) contains 22 as substring.

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 (243034070681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2251025 + ... + 2356518.

It is an arithmetic number, because the mean of its divisors is an integer number (60759682728).

Almost surely, 2^243034070621 is an apocalyptic number.

It is an amenable number.

243034070621 is a deficient number, since it is larger than the sum of its proper divisors (4660291).

243034070621 is an equidigital number, since it uses as much as digits as its factorization.

243034070621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4660290.

The product of its (nonzero) digits is 24192, while the sum is 32.

The spelling of 243034070621 in words is "two hundred forty-three billion, thirty-four million, seventy thousand, six hundred twenty-one".