422417821 has 8 divisors (see below), whose sum is σ = 482968640. Its totient is φ = 361918368.

The previous prime is 422417813. The next prime is 422417833. The reversal of 422417821 is 128714224.

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

It is not a de Polignac number, because 422417821 - 2³ = 422417813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422417881) 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, 6790 + ... + 29848.

It is an arithmetic number, because the mean of its divisors is an integer number (60371080).

Almost surely, 2^422417821 is an apocalyptic number.

It is an amenable number.

422417821 is a deficient number, since it is larger than the sum of its proper divisors (60550819).

422417821 is a wasteful number, since it uses less digits than its factorization.

422417821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25683.

The product of its digits is 7168, while the sum is 31.

The square root of 422417821 is about 20552.8056722191. The cubic root of 422417821 is about 750.3215338387.

The spelling of 422417821 in words is "four hundred twenty-two million, four hundred seventeen thousand, eight hundred twenty-one".