243131040311 has 8 divisors (see below), whose sum is σ = 246050787840. Its totient is φ = 240222047832.

The previous prime is 243131040301. The next prime is 243131040337. The reversal of 243131040311 is 113040131342.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243131040311 is a prime.

It is a super-2 number, since 2×243131040311² (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 (243131040301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2643275 + ... + 2733708.

It is an arithmetic number, because the mean of its divisors is an integer number (30756348480).

Almost surely, 2^243131040311 is an apocalyptic number.

243131040311 is a deficient number, since it is larger than the sum of its proper divisors (2919747529).

243131040311 is a wasteful number, since it uses less digits than its factorization.

243131040311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5377525.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 243131040311 its reverse (113040131342), we get a palindrome (356171171653).

The spelling of 243131040311 in words is "two hundred forty-three billion, one hundred thirty-one million, forty thousand, three hundred eleven".