40255549 has 2 divisors, whose sum is σ = 40255550. Its totient is φ = 40255548.

The previous prime is 40255531. The next prime is 40255583. The reversal of 40255549 is 94555204.

It is a happy number.

It is an a-pointer prime, because the next prime (40255583) can be obtained adding 40255549 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25100100 + 15155449 = 5010^2 + 3893^2 .

It is a cyclic number.

It is not a de Polignac number, because 40255549 - 2⁷ = 40255421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40255049) 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 as a sum of consecutive naturals, namely, 20127774 + 20127775.

It is an arithmetic number, because the mean of its divisors is an integer number (20127775).

Almost surely, 2^40255549 is an apocalyptic number.

It is an amenable number.

40255549 is a deficient number, since it is larger than the sum of its proper divisors (1).

40255549 is an equidigital number, since it uses as much as digits as its factorization.

40255549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 40255549 is about 6344.7260776175. The cubic root of 40255549 is about 342.7219482434.

It can be divided in two parts, 40255 and 549, that added together give a palindrome (40804).

The spelling of 40255549 in words is "forty million, two hundred fifty-five thousand, five hundred forty-nine".