422643545 has 16 divisors (see below), whose sum is σ = 539375760. Its totient is φ = 316821504.

The previous prime is 422643541. The next prime is 422643547. The reversal of 422643545 is 545346224.

It can be written as a sum of positive squares in 8 ways, for example, as 18593344 + 404050201 = 4312^2 + 20101^2 .

It is a cyclic number.

It is not a de Polignac number, because 422643545 - 2² = 422643541 is a prime.

It is a super-2 number, since 2×422643545² = 357255132260334050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (422643541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8609 + ... + 30321.

It is an arithmetic number, because the mean of its divisors is an integer number (33710985).

Almost surely, 2^422643545 is an apocalyptic number.

It is an amenable number.

422643545 is a deficient number, since it is larger than the sum of its proper divisors (116732215).

422643545 is a wasteful number, since it uses less digits than its factorization.

422643545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21964.

The product of its digits is 115200, while the sum is 35.

The square root of 422643545 is about 20558.2962572291. The cubic root of 422643545 is about 750.4551577934.

Adding to 422643545 its reverse (545346224), we get a palindrome (967989769).

The spelling of 422643545 in words is "four hundred twenty-two million, six hundred forty-three thousand, five hundred forty-five".