211254225 has 72 divisors (see below), whose sum is σ = 432418752. Its totient is φ = 89107200.

The previous prime is 211254209. The next prime is 211254229. The reversal of 211254225 is 522452112.

It is not a de Polignac number, because 211254225 - 2⁴ = 211254209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211254195 and 211254204.

It is not an unprimeable number, because it can be changed into a prime (211254229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 87535 + ... + 89915.

It is an arithmetic number, because the mean of its divisors is an integer number (6005816).

Almost surely, 2^211254225 is an apocalyptic number.

211254225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

211254225 is an abundant number, since it is smaller than the sum of its proper divisors (221164527).

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

211254225 is a wasteful number, since it uses less digits than its factorization.

211254225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2427 (or 2409 counting only the distinct ones).

The product of its digits is 1600, while the sum is 24.

The square root of 211254225 is about 14534.5871974405. The cubic root of 211254225 is about 595.5731830332.

The spelling of 211254225 in words is "two hundred eleven million, two hundred fifty-four thousand, two hundred twenty-five".