43215128 has 16 divisors (see below), whose sum is σ = 88394760. Its totient is φ = 19643200.

The previous prime is 43215113. The next prime is 43215131. The reversal of 43215128 is 82151234.

It is a junction number, because it is equal to n+sod(n) for n = 43215097 and 43215106.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245453 + ... + 245628.

Almost surely, 2^43215128 is an apocalyptic number.

It is an amenable number.

43215128 is an abundant number, since it is smaller than the sum of its proper divisors (45179632).

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

43215128 is a wasteful number, since it uses less digits than its factorization.

43215128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491098 (or 491094 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

The square root of 43215128 is about 6573.8214152805. The cubic root of 43215128 is about 350.9230817132.

It can be divided in two parts, 4321 and 5128, that added together give a palindrome (9449).

The spelling of 43215128 in words is "forty-three million, two hundred fifteen thousand, one hundred twenty-eight".