643227126 has 16 divisors (see below), whose sum is σ = 1287796224. Its totient is φ = 214185384.

The previous prime is 643227107. The next prime is 643227149. The reversal of 643227126 is 621722346.

It is a super-2 number, since 2×643227126² = 827482271244439752, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49630 + ... + 61233.

It is an arithmetic number, because the mean of its divisors is an integer number (80487264).

Almost surely, 2^643227126 is an apocalyptic number.

643227126 is an abundant number, since it is smaller than the sum of its proper divisors (644569098).

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

643227126 is a wasteful number, since it uses less digits than its factorization.

643227126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111835.

The product of its digits is 24192, while the sum is 33.

The square root of 643227126 is about 25361.9227583399. The cubic root of 643227126 is about 863.2199132798.

The spelling of 643227126 in words is "six hundred forty-three million, two hundred twenty-seven thousand, one hundred twenty-six".