212143325 has 6 divisors (see below), whose sum is σ = 263057754. Its totient is φ = 169714640.

The previous prime is 212143319. The next prime is 212143333. The reversal of 212143325 is 523341212.

212143325 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 10588516 + 201554809 = 3254^2 + 14197^2 .

It is not a de Polignac number, because 212143325 - 2¹² = 212139229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212143325.

It is a congruent number.

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, 4242842 + ... + 4242891.

It is an arithmetic number, because the mean of its divisors is an integer number (43842959).

Almost surely, 2^212143325 is an apocalyptic number.

212143325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212143325 is a deficient number, since it is larger than the sum of its proper divisors (50914429).

212143325 is an equidigital number, since it uses as much as digits as its factorization.

212143325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8485743 (or 8485738 counting only the distinct ones).

The product of its digits is 1440, while the sum is 23.

The square root of 212143325 is about 14565.1407476893. The cubic root of 212143325 is about 596.4075379192.

Adding to 212143325 its reverse (523341212), we get a palindrome (735484537).

The spelling of 212143325 in words is "two hundred twelve million, one hundred forty-three thousand, three hundred twenty-five".