211225 has 24 divisors (see below), whose sum is σ = 321408. Its totient is φ = 134400.

The previous prime is 211219. The next prime is 211229. The reversal of 211225 is 522112.

211225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 211225 - 2³ = 211217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2940 + ... + 3010.

It is an arithmetic number, because the mean of its divisors is an integer number (13392).

2²¹¹²²⁵ is an apocalyptic number.

211225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

211225 is a deficient number, since it is larger than the sum of its proper divisors (110183).

211225 is a wasteful number, since it uses less digits than its factorization.

211225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105 (or 100 counting only the distinct ones).

The product of its digits is 40, while the sum is 13.

The square root of 211225 is about 459.5922105519. The cubic root of 211225 is about 59.5545717817.

Adding to 211225 its reverse (522112), we get a palindrome (733337).

The spelling of 211225 in words is "two hundred eleven thousand, two hundred twenty-five".