243430132032421 has 4 divisors (see below), whose sum is σ = 250009324790092. Its totient is φ = 236850939274752.

The previous prime is 243430132032383. The next prime is 243430132032467. The reversal of 243430132032421 is 124230231034342.

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 176437052927521 + 66993079104900 = 13282961^2 + 8184930^2 .

It is a cyclic number.

It is not a de Polignac number, because 243430132032421 - 2¹⁷ = 243430131901349 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 (243430132032481) 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, 3289596378780 + ... + 3289596378853.

It is an arithmetic number, because the mean of its divisors is an integer number (62502331197523).

Almost surely, 2^{243430132032421} is an apocalyptic number.

It is an amenable number.

243430132032421 is a deficient number, since it is larger than the sum of its proper divisors (6579192757671).

243430132032421 is an equidigital number, since it uses as much as digits as its factorization.

243430132032421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6579192757670.

The product of its (nonzero) digits is 82944, while the sum is 34.

Adding to 243430132032421 its reverse (124230231034342), we get a palindrome (367660363066763).

The spelling of 243430132032421 in words is "two hundred forty-three trillion, four hundred thirty billion, one hundred thirty-two million, thirty-two thousand, four hundred twenty-one".