43130031021 has 48 divisors (see below), whose sum is σ = 80349759360. Its totient is φ = 21632607360.

The previous prime is 43130031017. The next prime is 43130031031. The reversal of 43130031021 is 12013003134.

43130031021 is a `hidden beast` number, since 4 + 31 + 300 + 310 + 21 = 666.

It is not a de Polignac number, because 43130031021 - 2² = 43130031017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43130030985 and 43130031003.

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 47 ways as a sum of consecutive naturals, for example, 1052950 + ... + 1093143.

It is an arithmetic number, because the mean of its divisors is an integer number (1673953320).

Almost surely, 2^43130031021 is an apocalyptic number.

It is an amenable number.

43130031021 is a deficient number, since it is larger than the sum of its proper divisors (37219728339).

43130031021 is a wasteful number, since it uses less digits than its factorization.

43130031021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146146 (or 2146143 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 43130031021 its reverse (12013003134), we get a palindrome (55143034155).

The spelling of 43130031021 in words is "forty-three billion, one hundred thirty million, thirty-one thousand, twenty-one".