243154532243 has 16 divisors (see below), whose sum is σ = 294295633920. Its totient is φ = 196119467136.

The previous prime is 243154532213. The next prime is 243154532263. The reversal of 243154532243 is 342235451342.

It is a cyclic number.

It is not a de Polignac number, because 243154532243 - 2¹² = 243154528147 is a prime.

It is a super-2 number, since 2×243154532243² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243154532197 and 243154532206.

It is not an unprimeable number, because it can be changed into a prime (243154532213) 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, 409580 + ... + 808742.

It is an arithmetic number, because the mean of its divisors is an integer number (18393477120).

Almost surely, 2^243154532243 is an apocalyptic number.

243154532243 is a deficient number, since it is larger than the sum of its proper divisors (51141101677).

243154532243 is a wasteful number, since it uses less digits than its factorization.

243154532243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404306.

The product of its digits is 345600, while the sum is 38.

Adding to 243154532243 its reverse (342235451342), we get a palindrome (585389983585).

The spelling of 243154532243 in words is "two hundred forty-three billion, one hundred fifty-four million, five hundred thirty-two thousand, two hundred forty-three".