40420553 has 2 divisors, whose sum is σ = 40420554. Its totient is φ = 40420552.

The previous prime is 40420531. The next prime is 40420573. The reversal of 40420553 is 35502404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20457529 + 19963024 = 4523^2 + 4468^2 .

It is a cyclic number.

It is not a de Polignac number, because 40420553 - 2⁸ = 40420297 is a prime.

It is a super-2 number, since 2×40420553² = 3267642209651618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40420573) 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, 20210276 + 20210277.

It is an arithmetic number, because the mean of its divisors is an integer number (20210277).

Almost surely, 2^40420553 is an apocalyptic number.

It is an amenable number.

40420553 is a deficient number, since it is larger than the sum of its proper divisors (1).

40420553 is an equidigital number, since it uses as much as digits as its factorization.

40420553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 40420553 is about 6357.7160207106. The cubic root of 40420553 is about 343.1895724097.

Adding to 40420553 its reverse (35502404), we get a palindrome (75922957).

The spelling of 40420553 in words is "forty million, four hundred twenty thousand, five hundred fifty-three".