243122131 has 8 divisors (see below), whose sum is σ = 278261504. Its totient is φ = 208084680.

The previous prime is 243122123. The next prime is 243122141. The reversal of 243122131 is 131221342.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 243122131 - 2³ = 243122123 is a prime.

It is a super-2 number, since 2×243122131² = 118216741163962322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243122099 and 243122108.

It is not an unprimeable number, because it can be changed into a prime (243122111) 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, 20295 + ... + 29968.

It is an arithmetic number, because the mean of its divisors is an integer number (34782688).

Almost surely, 2^243122131 is an apocalyptic number.

243122131 is a deficient number, since it is larger than the sum of its proper divisors (35139373).

243122131 is an equidigital number, since it uses as much as digits as its factorization.

243122131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50961.

The product of its digits is 288, while the sum is 19.

The square root of 243122131 is about 15592.3741296828. The cubic root of 243122131 is about 624.1296737341.

Adding to 243122131 its reverse (131221342), we get a palindrome (374343473).

It can be divided in two parts, 243122 and 131, that added together give a triangular number (243253 = T₆₉₇).

The spelling of 243122131 in words is "two hundred forty-three million, one hundred twenty-two thousand, one hundred thirty-one".