40071553 has 2 divisors, whose sum is σ = 40071554. Its totient is φ = 40071552.

The previous prime is 40071523. The next prime is 40071569. The reversal of 40071553 is 35517004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33558849 + 6512704 = 5793^2 + 2552^2 .

It is a cyclic number.

It is not a de Polignac number, because 40071553 - 2⁹ = 40071041 is a prime.

It is not a weakly prime, because it can be changed into another prime (40071523) 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, 20035776 + 20035777.

It is an arithmetic number, because the mean of its divisors is an integer number (20035777).

Almost surely, 2^40071553 is an apocalyptic number.

It is an amenable number.

40071553 is a deficient number, since it is larger than the sum of its proper divisors (1).

40071553 is an equidigital number, since it uses as much as digits as its factorization.

40071553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 40071553 is about 6330.2095541933. The cubic root of 40071553 is about 342.1989910433.

Adding to 40071553 its reverse (35517004), we get a palindrome (75588557).

The spelling of 40071553 in words is "forty million, seventy-one thousand, five hundred fifty-three".