43554981 has 8 divisors (see below), whose sum is σ = 58116064. Its totient is φ = 29015280.

The previous prime is 43554971. The next prime is 43554989. The reversal of 43554981 is 18945534.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 43554981 - 2⁵ = 43554949 is a prime.

It is a super-2 number, since 2×43554981² = 3794072739820722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43554989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 246 + ... + 9336.

It is an arithmetic number, because the mean of its divisors is an integer number (7264508).

Almost surely, 2^43554981 is an apocalyptic number.

It is an amenable number.

43554981 is a deficient number, since it is larger than the sum of its proper divisors (14561083).

43554981 is a wasteful number, since it uses less digits than its factorization.

43554981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10691.

The product of its digits is 86400, while the sum is 39.

The square root of 43554981 is about 6599.6197617742. The cubic root of 43554981 is about 351.8405920986.

The spelling of 43554981 in words is "forty-three million, five hundred fifty-four thousand, nine hundred eighty-one".