212042525 has 6 divisors (see below), whose sum is σ = 262932762. Its totient is φ = 169634000.

The previous prime is 212042477. The next prime is 212042569. The reversal of 212042525 is 525240212.

It can be written as a sum of positive squares in 3 ways, for example, as 16630084 + 195412441 = 4078^2 + 13979^2 .

It is not a de Polignac number, because 212042525 - 2⁸ = 212042269 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 212042525.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 4240826 + ... + 4240875.

It is an arithmetic number, because the mean of its divisors is an integer number (43822127).

Almost surely, 2^212042525 is an apocalyptic number.

212042525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212042525 is a deficient number, since it is larger than the sum of its proper divisors (50890237).

212042525 is an equidigital number, since it uses as much as digits as its factorization.

212042525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8481711 (or 8481706 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 212042525 is about 14561.6800198329. The cubic root of 212042525 is about 596.3130618474.

Adding to 212042525 its reverse (525240212), we get a palindrome (737282737).

The spelling of 212042525 in words is "two hundred twelve million, forty-two thousand, five hundred twenty-five".