212021325 has 18 divisors (see below), whose sum is σ = 379754154. Its totient is φ = 113077920.

The previous prime is 212021311. The next prime is 212021333. The reversal of 212021325 is 523120212.

It can be written as a sum of positive squares in 3 ways, for example, as 580644 + 211440681 = 762^2 + 14541^2 .

It is not a de Polignac number, because 212021325 - 2⁹ = 212020813 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212021298 and 212021307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 470934 + ... + 471383.

It is an arithmetic number, because the mean of its divisors is an integer number (21097453).

Almost surely, 2^212021325 is an apocalyptic number.

212021325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212021325 is a deficient number, since it is larger than the sum of its proper divisors (167732829).

212021325 is a wasteful number, since it uses less digits than its factorization.

212021325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942333 (or 942325 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 212021325 is about 14560.9520636530. The cubic root of 212021325 is about 596.2931880693.

Adding to 212021325 its reverse (523120212), we get a palindrome (735141537).

The spelling of 212021325 in words is "two hundred twelve million, twenty-one thousand, three hundred twenty-five".