43430131 has 4 divisors (see below), whose sum is σ = 43918200. Its totient is φ = 42942064.

The previous prime is 43430113. The next prime is 43430147. The reversal of 43430131 is 13103434.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 43430131 - 2¹¹ = 43428083 is a prime.

It is a super-2 number, since 2×43430131² = 3772352557354322, 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 = 43430099 and 43430108.

It is not an unprimeable number, because it can be changed into a prime (43400131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 243901 + ... + 244078.

It is an arithmetic number, because the mean of its divisors is an integer number (10979550).

Almost surely, 2^43430131 is an apocalyptic number.

43430131 is a deficient number, since it is larger than the sum of its proper divisors (488069).

43430131 is an equidigital number, since it uses as much as digits as its factorization.

43430131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488068.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 43430131 is about 6590.1540953152. The cubic root of 43430131 is about 351.5040876293.

Adding to 43430131 its reverse (13103434), we get a palindrome (56533565).

The spelling of 43430131 in words is "forty-three million, four hundred thirty thousand, one hundred thirty-one".