43131012 has 12 divisors (see below), whose sum is σ = 100639056. Its totient is φ = 14377000.

The previous prime is 43130987. The next prime is 43131031. The reversal of 43131012 is 21013134.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×43131012² = 3720568392288288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43130982 and 43131000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1797114 + ... + 1797137.

It is an arithmetic number, because the mean of its divisors is an integer number (8386588).

Almost surely, 2^43131012 is an apocalyptic number.

It is an amenable number.

43131012 is an abundant number, since it is smaller than the sum of its proper divisors (57508044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

43131012 is a wasteful number, since it uses less digits than its factorization.

43131012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3594258 (or 3594256 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 43131012 is about 6567.4204981865. The cubic root of 43131012 is about 350.6952493163.

Adding to 43131012 its reverse (21013134), we get a palindrome (64144146).

The spelling of 43131012 in words is "forty-three million, one hundred thirty-one thousand, twelve".