43845481 has 4 divisors (see below), whose sum is σ = 45030532. Its totient is φ = 42660432.

The previous prime is 43845467. The next prime is 43845493. The reversal of 43845481 is 18454834.

43845481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35808256 + 8037225 = 5984^2 + 2835^2 .

It is a cyclic number.

It is not a de Polignac number, because 43845481 - 2⁵ = 43845449 is a prime.

It is a super-2 number, since 2×43845481² = 3844852408242722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 1185013 = 43845481 / (4 + 3 + 8 + 4 + 5 + 4 + 8 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43845481.

It is not an unprimeable number, because it can be changed into a prime (43845401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 592470 + ... + 592543.

It is an arithmetic number, because the mean of its divisors is an integer number (11257633).

Almost surely, 2^43845481 is an apocalyptic number.

It is an amenable number.

43845481 is a deficient number, since it is larger than the sum of its proper divisors (1185051).

43845481 is a wasteful number, since it uses less digits than its factorization.

43845481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185050.

The product of its digits is 61440, while the sum is 37.

The square root of 43845481 is about 6621.5920291120. The cubic root of 43845481 is about 352.6210867814.

The spelling of 43845481 in words is "forty-three million, eight hundred forty-five thousand, four hundred eighty-one".