42225553 has 2 divisors, whose sum is σ = 42225554. Its totient is φ = 42225552.

The previous prime is 42225541. The next prime is 42225593. The reversal of 42225553 is 35552224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34951744 + 7273809 = 5912^2 + 2697^2 .

It is a cyclic number.

It is not a de Polignac number, because 42225553 - 2¹³ = 42217361 is a prime.

It is not a weakly prime, because it can be changed into another prime (42225523) 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, 21112776 + 21112777.

It is an arithmetic number, because the mean of its divisors is an integer number (21112777).

Almost surely, 2^42225553 is an apocalyptic number.

It is an amenable number.

42225553 is a deficient number, since it is larger than the sum of its proper divisors (1).

42225553 is an equidigital number, since it uses as much as digits as its factorization.

42225553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12000, while the sum is 28.

The square root of 42225553 is about 6498.1191894270. The cubic root of 42225553 is about 348.2237985512.

Adding to 42225553 its reverse (35552224), we get a palindrome (77777777).

It can be divided in two parts, 42225 and 553, that added together give a triangular number (42778 = T₂₉₂).

The spelling of 42225553 in words is "forty-two million, two hundred twenty-five thousand, five hundred fifty-three".