243155044211 has 4 divisors (see below), whose sum is σ = 243158521752. Its totient is φ = 243151566672.

The previous prime is 243155044127. The next prime is 243155044217. The reversal of 243155044211 is 112440551342.

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

It is a cyclic number.

It is not a de Polignac number, because 243155044211 - 2²⁶ = 243087935347 is a prime.

It is a super-2 number, since 2×243155044211² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243155044217) 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, 1631690 + ... + 1774463.

It is an arithmetic number, because the mean of its divisors is an integer number (60789630438).

Almost surely, 2^243155044211 is an apocalyptic number.

243155044211 is a deficient number, since it is larger than the sum of its proper divisors (3477541).

243155044211 is an equidigital number, since it uses as much as digits as its factorization.

243155044211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3477540.

The product of its (nonzero) digits is 19200, while the sum is 32.

Adding to 243155044211 its reverse (112440551342), we get a palindrome (355595595553).

The spelling of 243155044211 in words is "two hundred forty-three billion, one hundred fifty-five million, forty-four thousand, two hundred eleven".