40305553 has 2 divisors, whose sum is σ = 40305554. Its totient is φ = 40305552.

The previous prime is 40305523. The next prime is 40305569. The reversal of 40305553 is 35550304.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39853969 + 451584 = 6313^2 + 672^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40305553 is a prime.

It is not a weakly prime, because it can be changed into another prime (40305523) 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, 20152776 + 20152777.

It is an arithmetic number, because the mean of its divisors is an integer number (20152777).

Almost surely, 2^40305553 is an apocalyptic number.

It is an amenable number.

40305553 is a deficient number, since it is larger than the sum of its proper divisors (1).

40305553 is an equidigital number, since it uses as much as digits as its factorization.

40305553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4500, while the sum is 25.

The square root of 40305553 is about 6348.6654503132. The cubic root of 40305553 is about 342.8637951669.

Adding to 40305553 its reverse (35550304), we get a palindrome (75855857).

The spelling of 40305553 in words is "forty million, three hundred five thousand, five hundred fifty-three".