422556557 has 4 divisors (see below), whose sum is σ = 423610716. Its totient is φ = 421502400.

The previous prime is 422556517. The next prime is 422556587. The reversal of 422556557 is 755655224.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 349727401 + 72829156 = 18701^2 + 8534^2 .

It is a cyclic number.

It is not a de Polignac number, because 422556557 - 2⁶ = 422556493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422556517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 526478 + ... + 527279.

It is an arithmetic number, because the mean of its divisors is an integer number (105902679).

Almost surely, 2^422556557 is an apocalyptic number.

It is an amenable number.

422556557 is a deficient number, since it is larger than the sum of its proper divisors (1054159).

422556557 is a wasteful number, since it uses less digits than its factorization.

422556557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054158.

The product of its digits is 420000, while the sum is 41.

The square root of 422556557 is about 20556.1805061154. The cubic root of 422556557 is about 750.4036683265.

The spelling of 422556557 in words is "four hundred twenty-two million, five hundred fifty-six thousand, five hundred fifty-seven".