212766225 has 24 divisors (see below), whose sum is σ = 402027840. Its totient is φ = 97264320.

The previous prime is 212766217. The next prime is 212766233. The reversal of 212766225 is 522667212.

It is an interprime number because it is at equal distance from previous prime (212766217) and next prime (212766233).

It is not a de Polignac number, because 212766225 - 2³ = 212766217 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 202110 + ... + 203159.

It is an arithmetic number, because the mean of its divisors is an integer number (16751160).

Almost surely, 2^212766225 is an apocalyptic number.

212766225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212766225 is a deficient number, since it is larger than the sum of its proper divisors (189261615).

212766225 is a wasteful number, since it uses less digits than its factorization.

212766225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405289 (or 405284 counting only the distinct ones).

The product of its digits is 20160, while the sum is 33.

The square root of 212766225 is about 14586.5083210479. The cubic root of 212766225 is about 596.9906959373.

The spelling of 212766225 in words is "two hundred twelve million, seven hundred sixty-six thousand, two hundred twenty-five".