212513643 has 12 divisors (see below), whose sum is σ = 307698768. Its totient is φ = 141336720.

The previous prime is 212513641. The next prime is 212513647. The reversal of 212513643 is 346315212.

212513643 is a `hidden beast` number, since 2 + 1 + 2 + 5 + 13 + 643 = 666.

It is not a de Polignac number, because 212513643 - 2¹ = 212513641 is a prime.

It is a super-2 number, since 2×212513643² = 90324096922262898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212513641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24255 + ... + 31832.

It is an arithmetic number, because the mean of its divisors is an integer number (25641564).

Almost surely, 2^212513643 is an apocalyptic number.

212513643 is a deficient number, since it is larger than the sum of its proper divisors (95185125).

212513643 is a wasteful number, since it uses less digits than its factorization.

212513643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56514 (or 56511 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 212513643 is about 14577.8476806420. The cubic root of 212513643 is about 596.7543664286.

Adding to 212513643 its reverse (346315212), we get a palindrome (558828855).

The spelling of 212513643 in words is "two hundred twelve million, five hundred thirteen thousand, six hundred forty-three".