211125660 has 48 divisors (see below), whose sum is σ = 591825696. Its totient is φ = 56236032.

The previous prime is 211125623. The next prime is 211125661. The reversal of 211125660 is 66521112.

211125660 is nontrivially palindromic in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 211125660.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211125661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76464 + ... + 79176.

It is an arithmetic number, because the mean of its divisors is an integer number (12329702).

Almost surely, 2^211125660 is an apocalyptic number.

211125660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211125660 is an abundant number, since it is smaller than the sum of its proper divisors (380700036).

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

211125660 is a wasteful number, since it uses less digits than its factorization.

211125660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4022 (or 4020 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 211125660 is about 14530.1637981132. The cubic root of 211125660 is about 595.4523406303.

Adding to 211125660 its reverse (66521112), we get a palindrome (277646772).

The spelling of 211125660 in words is "two hundred eleven million, one hundred twenty-five thousand, six hundred sixty".