40203641 has 2 divisors, whose sum is σ = 40203642. Its totient is φ = 40203640.

The previous prime is 40203619. The next prime is 40203673. The reversal of 40203641 is 14630204.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25603600 + 14600041 = 5060^2 + 3821^2 .

It is a cyclic number.

It is not a de Polignac number, because 40203641 - 2⁶ = 40203577 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40203041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20101820 + 20101821.

It is an arithmetic number, because the mean of its divisors is an integer number (20101821).

Almost surely, 2^40203641 is an apocalyptic number.

It is an amenable number.

40203641 is a deficient number, since it is larger than the sum of its proper divisors (1).

40203641 is an equidigital number, since it uses as much as digits as its factorization.

40203641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 40203641 is about 6340.6341165533. The cubic root of 40203641 is about 342.5745759073.

Adding to 40203641 its reverse (14630204), we get a palindrome (54833845).

The spelling of 40203641 in words is "forty million, two hundred three thousand, six hundred forty-one".