43118531 has 2 divisors, whose sum is σ = 43118532. Its totient is φ = 43118530.

The previous prime is 43118507. The next prime is 43118609. The reversal of 43118531 is 13581134.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43118531 - 2¹⁰ = 43117507 is a prime.

It is a super-2 number, since 2×43118531² = 3718415431195922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43118531.

It is not a weakly prime, because it can be changed into another prime (43118501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21559265 + 21559266.

It is an arithmetic number, because the mean of its divisors is an integer number (21559266).

Almost surely, 2^43118531 is an apocalyptic number.

43118531 is a deficient number, since it is larger than the sum of its proper divisors (1).

43118531 is an equidigital number, since it uses as much as digits as its factorization.

43118531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 26.

The square root of 43118531 is about 6566.4702085672. The cubic root of 43118531 is about 350.6614186728.

Adding to 43118531 its reverse (13581134), we get a palindrome (56699665).

The spelling of 43118531 in words is "forty-three million, one hundred eighteen thousand, five hundred thirty-one".