243055523131 has 4 divisors (see below), whose sum is σ = 248983706664. Its totient is φ = 237127339600.

The previous prime is 243055523119. The next prime is 243055523147. The reversal of 243055523131 is 131325550342.

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 243055523131 - 2⁷ = 243055523003 is a prime.

It is a super-2 number, since 2×243055523131² (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 (243055523111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2964091705 + ... + 2964091786.

It is an arithmetic number, because the mean of its divisors is an integer number (62245926666).

Almost surely, 2^243055523131 is an apocalyptic number.

243055523131 is a deficient number, since it is larger than the sum of its proper divisors (5928183533).

243055523131 is an equidigital number, since it uses as much as digits as its factorization.

243055523131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5928183532.

The product of its (nonzero) digits is 54000, while the sum is 34.

The spelling of 243055523131 in words is "two hundred forty-three billion, fifty-five million, five hundred twenty-three thousand, one hundred thirty-one".