40554081 has 16 divisors (see below), whose sum is σ = 61067520. Its totient is φ = 26591760.

The previous prime is 40554079. The next prime is 40554121. The reversal of 40554081 is 18045504.

40554081 is a `hidden beast` number, since 40 + 5 + 540 + 81 = 666.

40554081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40554081 - 2¹ = 40554079 is a prime.

It is a super-2 number, since 2×40554081² = 3289266971509122, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40554071) 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 15 ways as a sum of consecutive naturals, for example, 10665 + ... + 13958.

It is an arithmetic number, because the mean of its divisors is an integer number (3816720).

Almost surely, 2^40554081 is an apocalyptic number.

It is an amenable number.

40554081 is a deficient number, since it is larger than the sum of its proper divisors (20513439).

40554081 is a wasteful number, since it uses less digits than its factorization.

40554081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24693 (or 24687 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 40554081 is about 6368.2086178140. The cubic root of 40554081 is about 343.5670622864.

Adding to 40554081 its reverse (18045504), we get a palindrome (58599585).

The spelling of 40554081 in words is "forty million, five hundred fifty-four thousand, eighty-one".