243402245131 has 4 divisors (see below), whose sum is σ = 248581016352. Its totient is φ = 238223473912.

The previous prime is 243402245111. The next prime is 243402245161. The reversal of 243402245131 is 131542204342.

243402245131 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.

It is a cyclic number.

It is not a de Polignac number, because 243402245131 - 2⁷ = 243402245003 is a prime.

It is a super-2 number, since 2×243402245131² (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 = 243402245093 and 243402245102.

It is not an unprimeable number, because it can be changed into a prime (243402245111) 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, 2589385540 + ... + 2589385633.

It is an arithmetic number, because the mean of its divisors is an integer number (62145254088).

Almost surely, 2^243402245131 is an apocalyptic number.

243402245131 is a deficient number, since it is larger than the sum of its proper divisors (5178771221).

243402245131 is an equidigital number, since it uses as much as digits as its factorization.

243402245131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5178771220.

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 243402245131 its reverse (131542204342), we get a palindrome (374944449473).

The spelling of 243402245131 in words is "two hundred forty-three billion, four hundred two million, two hundred forty-five thousand, one hundred thirty-one".