212086225 has 12 divisors (see below), whose sum is σ = 283217116. Its totient is φ = 156617280.

The previous prime is 212086219. The next prime is 212086261. The reversal of 212086225 is 522680212.

It can be written as a sum of positive squares in 6 ways, for example, as 18653761 + 193432464 = 4319^2 + 13908^2 .

It is not a de Polignac number, because 212086225 - 2¹¹ = 212084177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212086193 and 212086202.

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, 325962 + ... + 326611.

Almost surely, 2^212086225 is an apocalyptic number.

212086225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212086225 is a deficient number, since it is larger than the sum of its proper divisors (71130891).

212086225 is a wasteful number, since it uses less digits than its factorization.

212086225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652596 (or 652591 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 212086225 is about 14563.1804562053. The cubic root of 212086225 is about 596.3540238994.

The spelling of 212086225 in words is "two hundred twelve million, eighty-six thousand, two hundred twenty-five".