243120032311 has 4 divisors (see below), whose sum is σ = 261821573272. Its totient is φ = 224418491352.

The previous prime is 243120032303. The next prime is 243120032317. The reversal of 243120032311 is 113230021342.

243120032311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 113230021342 = 2 ⋅56615010671.

It is a cyclic number.

It is not a de Polignac number, because 243120032311 - 2³ = 243120032303 is a prime.

It is a super-2 number, since 2×243120032311² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243120032317) 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 3 ways as a sum of consecutive naturals, for example, 9350770461 + ... + 9350770486.

It is an arithmetic number, because the mean of its divisors is an integer number (65455393318).

Almost surely, 2^243120032311 is an apocalyptic number.

243120032311 is a deficient number, since it is larger than the sum of its proper divisors (18701540961).

243120032311 is a wasteful number, since it uses less digits than its factorization.

243120032311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18701540960.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 243120032311 its reverse (113230021342), we get a palindrome (356350053653).

The spelling of 243120032311 in words is "two hundred forty-three billion, one hundred twenty million, thirty-two thousand, three hundred eleven".