212134346625 has 16 divisors (see below), whose sum is σ = 352991553408. Its totient is φ = 113138318000.

The previous prime is 212134346623. The next prime is 212134346653. The reversal of 212134346625 is 526643431212.

It is not a de Polignac number, because 212134346625 - 2¹ = 212134346623 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212134346623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 282845421 + ... + 282846170.

It is an arithmetic number, because the mean of its divisors is an integer number (22061972088).

Almost surely, 2^212134346625 is an apocalyptic number.

212134346625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

212134346625 is a deficient number, since it is larger than the sum of its proper divisors (140857206783).

212134346625 is an equidigital number, since it uses as much as digits as its factorization.

212134346625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565691609 (or 565691599 counting only the distinct ones).

The product of its digits is 207360, while the sum is 39.

Adding to 212134346625 its reverse (526643431212), we get a palindrome (738777777837).

The spelling of 212134346625 in words is "two hundred twelve billion, one hundred thirty-four million, three hundred forty-six thousand, six hundred twenty-five".