43528813 has 2 divisors, whose sum is σ = 43528814. Its totient is φ = 43528812.

The previous prime is 43528801. The next prime is 43528819. The reversal of 43528813 is 31882534.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30008484 + 13520329 = 5478^2 + 3677^2 .

It is a cyclic number.

It is not a de Polignac number, because 43528813 - 2⁵ = 43528781 is a prime.

It is a super-2 number, since 2×43528813² = 3789515122377938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43528819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21764406 + 21764407.

It is an arithmetic number, because the mean of its divisors is an integer number (21764407).

Almost surely, 2^43528813 is an apocalyptic number.

It is an amenable number.

43528813 is a deficient number, since it is larger than the sum of its proper divisors (1).

43528813 is an equidigital number, since it uses as much as digits as its factorization.

43528813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 34.

The square root of 43528813 is about 6597.6369254454. The cubic root of 43528813 is about 351.7701155892.

The spelling of 43528813 in words is "forty-three million, five hundred twenty-eight thousand, eight hundred thirteen".