43523131 has 2 divisors, whose sum is σ = 43523132. Its totient is φ = 43523130.

The previous prime is 43523089. The next prime is 43523141. The reversal of 43523131 is 13132534.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43523131 is a prime.

It is a super-2 number, since 2×43523131² = 3788525864086322, which contains 22 as substring.

It is equal to p_2634313 and since 43523131 and 2634313 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (43523141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21761565 + 21761566.

It is an arithmetic number, because the mean of its divisors is an integer number (21761566).

Almost surely, 2^43523131 is an apocalyptic number.

43523131 is a deficient number, since it is larger than the sum of its proper divisors (1).

43523131 is an equidigital number, since it uses as much as digits as its factorization.

43523131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 22.

The square root of 43523131 is about 6597.2063026709. The cubic root of 43523131 is about 351.7548089097.

Adding to 43523131 its reverse (13132534), we get a palindrome (56655665).

The spelling of 43523131 in words is "forty-three million, five hundred twenty-three thousand, one hundred thirty-one".