212165325 has 30 divisors (see below), whose sum is σ = 393007274. Its totient is φ = 113153760.

The previous prime is 212165309. The next prime is 212165351. The reversal of 212165325 is 523561212.

It is a happy number.

212165325 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 653 + 2 + 5 = 666.

212165325 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 56340036 + 155825289 = 7506^2 + 12483^2 .

It is not a de Polignac number, because 212165325 - 2⁴ = 212165309 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 50362 + ... + 54411.

Almost surely, 2^212165325 is an apocalyptic number.

212165325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212165325 is a deficient number, since it is larger than the sum of its proper divisors (180841949).

212165325 is a wasteful number, since it uses less digits than its factorization.

212165325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104795 (or 104781 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 212165325 is about 14565.8959559651. The cubic root of 212165325 is about 596.4281537179.

The spelling of 212165325 in words is "two hundred twelve million, one hundred sixty-five thousand, three hundred twenty-five".