243630131 has 12 divisors (see below), whose sum is σ = 258227112. Its totient is φ = 229724544.

The previous prime is 243630083. The next prime is 243630133. The reversal of 243630131 is 131036342.

It is a de Polignac number, because none of the positive numbers 2^k-243630131 is a prime.

It is a super-2 number, since 2×243630131² = 118711281462154322, 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 = 243630097 and 243630106.

It is not an unprimeable number, because it can be changed into a prime (243630133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32795 + ... + 39531.

It is an arithmetic number, because the mean of its divisors is an integer number (21518926).

Almost surely, 2^243630131 is an apocalyptic number.

243630131 is a deficient number, since it is larger than the sum of its proper divisors (14596981).

243630131 is an equidigital number, since it uses as much as digits as its factorization.

243630131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6838 (or 6809 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 243630131 is about 15608.6556435844. The cubic root of 243630131 is about 624.5640744743.

Adding to 243630131 its reverse (131036342), we get a palindrome (374666473).

The spelling of 243630131 in words is "two hundred forty-three million, six hundred thirty thousand, one hundred thirty-one".