243010225421 has 4 divisors (see below), whose sum is σ = 243487652700. Its totient is φ = 242532798144.

The previous prime is 243010225357. The next prime is 243010225433. The reversal of 243010225421 is 124522010342.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 130040293321 + 112969932100 = 360611^2 + 336110^2 .

It is a cyclic number.

It is not a de Polignac number, because 243010225421 - 2⁶ = 243010225357 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 (243010225021) 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, 238712876 + ... + 238713893.

It is an arithmetic number, because the mean of its divisors is an integer number (60871913175).

Almost surely, 2^243010225421 is an apocalyptic number.

It is an amenable number.

243010225421 is a deficient number, since it is larger than the sum of its proper divisors (477427279).

243010225421 is an equidigital number, since it uses as much as digits as its factorization.

243010225421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477427278.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 243010225421 its reverse (124522010342), we get a palindrome (367532235763).

The spelling of 243010225421 in words is "two hundred forty-three billion, ten million, two hundred twenty-five thousand, four hundred twenty-one".