213128576 has 16 divisors (see below), whose sum is σ = 424592340. Its totient is φ = 106564224.

The previous prime is 213128563. The next prime is 213128593. The reversal of 213128576 is 675821312.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 832406 + ... + 832661.

Almost surely, 2^213128576 is an apocalyptic number.

It is an amenable number.

213128576 is a deficient number, since it is larger than the sum of its proper divisors (211463764).

213128576 is an equidigital number, since it uses as much as digits as its factorization.

213128576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1665081 (or 1665069 counting only the distinct ones).

The product of its digits is 20160, while the sum is 35.

The square root of 213128576 is about 14598.9237959515. The cubic root of 213128576 is about 597.3294049132.

Adding to 213128576 its reverse (675821312), we get a palindrome (888949888).

The spelling of 213128576 in words is "two hundred thirteen million, one hundred twenty-eight thousand, five hundred seventy-six".