43130031231 has 12 divisors (see below), whose sum is σ = 66895558872. Its totient is φ = 24645732048.

The previous prime is 43130031193. The next prime is 43130031257. The reversal of 43130031231 is 13213003134.

It is not a de Polignac number, because 43130031231 - 2²² = 43125836927 is a prime.

It is a super-2 number, since 2×43130031231² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 43130031198 and 43130031207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43130031031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 146700640 + ... + 146700933.

It is an arithmetic number, because the mean of its divisors is an integer number (5574629906).

Almost surely, 2^43130031231 is an apocalyptic number.

43130031231 is a deficient number, since it is larger than the sum of its proper divisors (23765527641).

43130031231 is a wasteful number, since it uses less digits than its factorization.

43130031231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293401590 (or 293401583 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 43130031231 its reverse (13213003134), we get a palindrome (56343034365).

The spelling of 43130031231 in words is "forty-three billion, one hundred thirty million, thirty-one thousand, two hundred thirty-one".