243051221413 has 16 divisors (see below), whose sum is σ = 326334508416. Its totient is φ = 174822056640.

The previous prime is 243051221389. The next prime is 243051221449. The reversal of 243051221413 is 314122150342.

It is not a de Polignac number, because 243051221413 - 2¹⁷ = 243051090341 is a prime.

It is a super-2 number, since 2×243051221413² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243051221513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121403206 + ... + 121405207.

It is an arithmetic number, because the mean of its divisors is an integer number (20395906776).

Almost surely, 2^243051221413 is an apocalyptic number.

It is an amenable number.

243051221413 is a deficient number, since it is larger than the sum of its proper divisors (83283287003).

243051221413 is a wasteful number, since it uses less digits than its factorization.

243051221413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242808444.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 243051221413 its reverse (314122150342), we get a palindrome (557173371755).

It can be divided in two parts, 243051 and 221413, that added together give a palindrome (464464).

The spelling of 243051221413 in words is "two hundred forty-three billion, fifty-one million, two hundred twenty-one thousand, four hundred thirteen".