212510245 has 8 divisors (see below), whose sum is σ = 255934584. Its totient is φ = 169393344.

The previous prime is 212510209. The next prime is 212510261. The reversal of 212510245 is 542015212.

It can be written as a sum of positive squares in 4 ways, for example, as 35034561 + 177475684 = 5919^2 + 13322^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212510245 - 2²⁷ = 78292517 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 75334 + ... + 78103.

It is an arithmetic number, because the mean of its divisors is an integer number (31991823).

Almost surely, 2^212510245 is an apocalyptic number.

It is an amenable number.

212510245 is a deficient number, since it is larger than the sum of its proper divisors (43424339).

212510245 is a wasteful number, since it uses less digits than its factorization.

212510245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153719.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 212510245 is about 14577.7311334789. The cubic root of 212510245 is about 596.7511857980.

Adding to 212510245 its reverse (542015212), we get a palindrome (754525457).

The spelling of 212510245 in words is "two hundred twelve million, five hundred ten thousand, two hundred forty-five".