40155449 has 2 divisors, whose sum is σ = 40155450. Its totient is φ = 40155448.

The previous prime is 40155443. The next prime is 40155457. The reversal of 40155449 is 94455104.

40155449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25000000 + 15155449 = 5000^2 + 3893^2 .

It is a cyclic number.

It is not a de Polignac number, because 40155449 - 2⁴ = 40155433 is a prime.

It is a super-2 number, since 2×40155449² = 3224920168783202, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40155443) 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 as a sum of consecutive naturals, namely, 20077724 + 20077725.

It is an arithmetic number, because the mean of its divisors is an integer number (20077725).

Almost surely, 2^40155449 is an apocalyptic number.

It is an amenable number.

40155449 is a deficient number, since it is larger than the sum of its proper divisors (1).

40155449 is an equidigital number, since it uses as much as digits as its factorization.

40155449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 40155449 is about 6336.8327262127. The cubic root of 40155449 is about 342.4376400932.

It can be divided in two parts, 40155 and 449, that added together give a palindrome (40604).

The spelling of 40155449 in words is "forty million, one hundred fifty-five thousand, four hundred forty-nine".