422021555 has 8 divisors (see below), whose sum is σ = 512836800. Its totient is φ = 333343296.

The previous prime is 422021539. The next prime is 422021557. The reversal of 422021555 is 555120224.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 422021555 - 2⁴ = 422021539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (422021557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 533810 + ... + 534599.

It is an arithmetic number, because the mean of its divisors is an integer number (64104600).

Almost surely, 2^422021555 is an apocalyptic number.

422021555 is a deficient number, since it is larger than the sum of its proper divisors (90815245).

422021555 is a wasteful number, since it uses less digits than its factorization.

422021555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068493.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 422021555 is about 20543.1632179662. The cubic root of 422021555 is about 750.0868373527.

Adding to 422021555 its reverse (555120224), we get a palindrome (977141779).

The spelling of 422021555 in words is "four hundred twenty-two million, twenty-one thousand, five hundred fifty-five".