212707225 has 6 divisors (see below), whose sum is σ = 263756990. Its totient is φ = 170165760.

The previous prime is 212707219. The next prime is 212707279. The reversal of 212707225 is 522707212.

It can be written as a sum of positive squares in 3 ways, for example, as 9815689 + 202891536 = 3133^2 + 14244^2 .

It is not a de Polignac number, because 212707225 - 2³ = 212707217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212707193 and 212707202.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4254120 + ... + 4254169.

Almost surely, 2^212707225 is an apocalyptic number.

212707225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212707225 is a deficient number, since it is larger than the sum of its proper divisors (51049765).

212707225 is an equidigital number, since it uses as much as digits as its factorization.

212707225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8508299 (or 8508294 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 212707225 is about 14584.4857639891. The cubic root of 212707225 is about 596.9355090653.

The spelling of 212707225 in words is "two hundred twelve million, seven hundred seven thousand, two hundred twenty-five".