422471981 has 8 divisors (see below), whose sum is σ = 466772544. Its totient is φ = 380332480.

The previous prime is 422471953. The next prime is 422471993. The reversal of 422471981 is 189174224.

It is a happy number.

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 422471981 - 2¹⁰ = 422470957 is a prime.

It is a super-2 number, since 2×422471981² = 356965149460128722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422471921) 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, 539855 + ... + 540636.

It is an arithmetic number, because the mean of its divisors is an integer number (58346568).

Almost surely, 2^422471981 is an apocalyptic number.

It is an amenable number.

422471981 is a deficient number, since it is larger than the sum of its proper divisors (44300563).

422471981 is a wasteful number, since it uses less digits than its factorization.

422471981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080531.

The product of its digits is 32256, while the sum is 38.

The square root of 422471981 is about 20554.1232116576. The cubic root of 422471981 is about 750.3535997819.

The spelling of 422471981 in words is "four hundred twenty-two million, four hundred seventy-one thousand, nine hundred eighty-one".