643271214 has 32 divisors (see below), whose sum is σ = 1344661920. Its totient is φ = 204890112.

The previous prime is 643271207. The next prime is 643271219. The reversal of 643271214 is 412172346.

643271214 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×643271214² = 827595709522067592, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643271219) 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, 2179 + ... + 35934.

It is an arithmetic number, because the mean of its divisors is an integer number (42020685).

Almost surely, 2^643271214 is an apocalyptic number.

643271214 is an abundant number, since it is smaller than the sum of its proper divisors (701390706).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

643271214 is a wasteful number, since it uses less digits than its factorization.

643271214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38244.

The product of its digits is 8064, while the sum is 30.

The square root of 643271214 is about 25362.7919204491. The cubic root of 643271214 is about 863.2396350694.

The spelling of 643271214 in words is "six hundred forty-three million, two hundred seventy-one thousand, two hundred fourteen".