211625225 has 12 divisors (see below), whose sum is σ = 299903424. Its totient is φ = 145114320.

The previous prime is 211625221. The next prime is 211625243. The reversal of 211625225 is 522526112.

It is not a de Polignac number, because 211625225 - 2² = 211625221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211625194 and 211625203.

It is not an unprimeable number, because it can be changed into a prime (211625221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 604469 + ... + 604818.

It is an arithmetic number, because the mean of its divisors is an integer number (24991952).

Almost surely, 2^211625225 is an apocalyptic number.

211625225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

211625225 is a deficient number, since it is larger than the sum of its proper divisors (88278199).

211625225 is a wasteful number, since it uses less digits than its factorization.

211625225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209304 (or 1209299 counting only the distinct ones).

The product of its digits is 2400, while the sum is 26.

The square root of 211625225 is about 14547.3442593485. The cubic root of 211625225 is about 595.9216232911.

The spelling of 211625225 in words is "two hundred eleven million, six hundred twenty-five thousand, two hundred twenty-five".