43115131 has 2 divisors, whose sum is σ = 43115132. Its totient is φ = 43115130.

The previous prime is 43115117. The next prime is 43115143. The reversal of 43115131 is 13151134.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43115131 - 2⁵ = 43115099 is a prime.

It is a super-2 number, since 2×43115131² = 3717829042294322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43115099 and 43115108.

It is not a weakly prime, because it can be changed into another prime (43110131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21557565 + 21557566.

It is an arithmetic number, because the mean of its divisors is an integer number (21557566).

Almost surely, 2^43115131 is an apocalyptic number.

43115131 is a deficient number, since it is larger than the sum of its proper divisors (1).

43115131 is an equidigital number, since it uses as much as digits as its factorization.

43115131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 180, while the sum is 19.

The square root of 43115131 is about 6566.2113124693. The cubic root of 43115131 is about 350.6522015981.

Adding to 43115131 its reverse (13151134), we get a palindrome (56266265).

The spelling of 43115131 in words is "forty-three million, one hundred fifteen thousand, one hundred thirty-one".