243229421 has 8 divisors (see below), whose sum is σ = 257965560. Its totient is φ = 228540928.

The previous prime is 243229417. The next prime is 243229423. The reversal of 243229421 is 124922342.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 15642025 + 227587396 = 3955^2 + 15086^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243229421 - 2² = 243229417 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 (243229423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1106 + ... + 22083.

It is an arithmetic number, because the mean of its divisors is an integer number (32245695).

Almost surely, 2^243229421 is an apocalyptic number.

It is an amenable number.

243229421 is a deficient number, since it is larger than the sum of its proper divisors (14736139).

243229421 is a wasteful number, since it uses less digits than its factorization.

243229421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23823.

The product of its digits is 6912, while the sum is 29.

The square root of 243229421 is about 15595.8142140768. The cubic root of 243229421 is about 624.2214698814.

The spelling of 243229421 in words is "two hundred forty-three million, two hundred twenty-nine thousand, four hundred twenty-one".