211575125 has 12 divisors (see below), whose sum is σ = 264248868. Its totient is φ = 169130000.

The previous prime is 211575113. The next prime is 211575131. The reversal of 211575125 is 521575112.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 6 ways, for example, as 201583204 + 9991921 = 14198^2 + 3161^2 .

It is not a de Polignac number, because 211575125 - 2²² = 207380821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 161975 + ... + 163275.

It is an arithmetic number, because the mean of its divisors is an integer number (22020739).

Almost surely, 2^211575125 is an apocalyptic number.

211575125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

211575125 is a deficient number, since it is larger than the sum of its proper divisors (52673743).

211575125 is an frugal number, since it uses more digits than its factorization.

211575125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2617 (or 1306 counting only the distinct ones).

The product of its digits is 3500, while the sum is 29.

The square root of 211575125 is about 14545.6221936361. The cubic root of 211575125 is about 595.8745935642.

The spelling of 211575125 in words is "two hundred eleven million, five hundred seventy-five thousand, one hundred twenty-five".