211151225 has 12 divisors (see below), whose sum is σ = 262094460. Its totient is φ = 168748800.

The previous prime is 211151221. The next prime is 211151309. The reversal of 211151225 is 522151112.

It can be written as a sum of positive squares in 6 ways, for example, as 6775609 + 204375616 = 2603^2 + 14296^2 .

It is not a de Polignac number, because 211151225 - 2² = 211151221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211151197 and 211151206.

It is not an unprimeable number, because it can be changed into a prime (211151221) 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, 24485 + ... + 31965.

It is an arithmetic number, because the mean of its divisors is an integer number (21841205).

Almost surely, 2^211151225 is an apocalyptic number.

211151225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

211151225 is a deficient number, since it is larger than the sum of its proper divisors (50943235).

211151225 is a wasteful number, since it uses less digits than its factorization.

211151225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8620 (or 8615 counting only the distinct ones).

The product of its digits is 200, while the sum is 20.

The square root of 211151225 is about 14531.0434931563. The cubic root of 211151225 is about 595.4763739078.

The spelling of 211151225 in words is "two hundred eleven million, one hundred fifty-one thousand, two hundred twenty-five".