43125131 has 4 divisors (see below), whose sum is σ = 49285872. Its totient is φ = 36964392.

The previous prime is 43125127. The next prime is 43125139. The reversal of 43125131 is 13152134.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13152134 = 2 ⋅6576067.

It is a cyclic number.

It is not a de Polignac number, because 43125131 - 2² = 43125127 is a prime.

It is a super-2 number, since 2×43125131² = 3719553847534322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43125139) 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, 3080360 + ... + 3080373.

It is an arithmetic number, because the mean of its divisors is an integer number (12321468).

Almost surely, 2^43125131 is an apocalyptic number.

43125131 is a deficient number, since it is larger than the sum of its proper divisors (6160741).

43125131 is an equidigital number, since it uses as much as digits as its factorization.

43125131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6160740.

The product of its digits is 360, while the sum is 20.

The square root of 43125131 is about 6566.9727424438. The cubic root of 43125131 is about 350.6793092582.

Adding to 43125131 its reverse (13152134), we get a palindrome (56277265).

The spelling of 43125131 in words is "forty-three million, one hundred twenty-five thousand, one hundred thirty-one".