243274043421 has 12 divisors (see below), whose sum is σ = 351445641820. Its totient is φ = 162159710400.

The previous prime is 243274043417. The next prime is 243274043443. The reversal of 243274043421 is 124340472342.

243274043421 is a `hidden beast` number, since 2 + 43 + 274 + 0 + 4 + 342 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 41448480921 + 201825562500 = 203589^2 + 449250^2 .

It is not a de Polignac number, because 243274043421 - 2² = 243274043417 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 (243274043401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1848280 + ... + 1975521.

Almost surely, 2^243274043421 is an apocalyptic number.

It is an amenable number.

243274043421 is a deficient number, since it is larger than the sum of its proper divisors (108171598399).

243274043421 is a wasteful number, since it uses less digits than its factorization.

243274043421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3830876 (or 3830873 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 36.

The spelling of 243274043421 in words is "two hundred forty-three billion, two hundred seventy-four million, forty-three thousand, four hundred twenty-one".