212504396065 has 16 divisors (see below), whose sum is σ = 274636832400. Its totient is φ = 156917313792.

The previous prime is 212504396059. The next prime is 212504396077. The reversal of 212504396065 is 560693405212.

212504396065 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 8 ways, for example, as 14302246464 + 198202149601 = 119592^2 + 445199^2 .

It is a cyclic number.

It is not a de Polignac number, because 212504396065 - 2⁵ = 212504396033 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1178751 + ... + 1347019.

It is an arithmetic number, because the mean of its divisors is an integer number (17164802025).

Almost surely, 2^212504396065 is an apocalyptic number.

It is an amenable number.

212504396065 is a deficient number, since it is larger than the sum of its proper divisors (62132436335).

212504396065 is a wasteful number, since it uses less digits than its factorization.

212504396065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187716.

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 212504396065 in words is "two hundred twelve billion, five hundred four million, three hundred ninety-six thousand, sixty-five".