422156643 has 16 divisors (see below), whose sum is σ = 581345280. Its totient is φ = 272288736.

The previous prime is 422156641. The next prime is 422156659. The reversal of 422156643 is 346651224.

It is not a de Polignac number, because 422156643 - 2¹ = 422156641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (422156641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9246 + ... + 30492.

It is an arithmetic number, because the mean of its divisors is an integer number (36334080).

Almost surely, 2^422156643 is an apocalyptic number.

422156643 is a deficient number, since it is larger than the sum of its proper divisors (159188637).

422156643 is a wasteful number, since it uses less digits than its factorization.

422156643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21466.

The product of its digits is 34560, while the sum is 33.

The square root of 422156643 is about 20546.4508614018. The cubic root of 422156643 is about 750.1668624287.

The spelling of 422156643 in words is "four hundred twenty-two million, one hundred fifty-six thousand, six hundred forty-three".