43540801 has 4 divisors (see below), whose sum is σ = 43554004. Its totient is φ = 43527600.

The previous prime is 43540787. The next prime is 43540829. The reversal of 43540801 is 10804534.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 15397776 + 28143025 = 3924^2 + 5305^2 .

It is a cyclic number.

It is not a de Polignac number, because 43540801 - 2¹¹ = 43538753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43540831) 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, 3031 + ... + 9811.

It is an arithmetic number, because the mean of its divisors is an integer number (10888501).

Almost surely, 2^43540801 is an apocalyptic number.

It is an amenable number.

43540801 is a deficient number, since it is larger than the sum of its proper divisors (13203).

43540801 is an equidigital number, since it uses as much as digits as its factorization.

43540801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13202.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 43540801 is about 6598.5453700039. The cubic root of 43540801 is about 351.8024055659.

The spelling of 43540801 in words is "forty-three million, five hundred forty thousand, eight hundred one".