212513647 has 2 divisors, whose sum is σ = 212513648. Its totient is φ = 212513646.

The previous prime is 212513641. The next prime is 212513657. The reversal of 212513647 is 746315212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 212513647 - 2¹⁹ = 211989359 is a prime.

It is a super-2 number, since 2×212513647² = 90324100322481218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212513641) 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 as a sum of consecutive naturals, namely, 106256823 + 106256824.

It is an arithmetic number, because the mean of its divisors is an integer number (106256824).

Almost surely, 2^212513647 is an apocalyptic number.

212513647 is a deficient number, since it is larger than the sum of its proper divisors (1).

212513647 is an equidigital number, since it uses as much as digits as its factorization.

212513647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 31.

The square root of 212513647 is about 14577.8478178365. The cubic root of 212513647 is about 596.7543701727.

Adding to 212513647 its reverse (746315212), we get a palindrome (958828859).

The spelling of 212513647 in words is "two hundred twelve million, five hundred thirteen thousand, six hundred forty-seven".