212644522511 has 4 divisors (see below), whose sum is σ = 214595389800. Its totient is φ = 210693655224.

The previous prime is 212644522471. The next prime is 212644522561. The reversal of 212644522511 is 115225446212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212644522511 - 2¹⁴ = 212644506127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212644522561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 975433481 + ... + 975433698.

It is an arithmetic number, because the mean of its divisors is an integer number (53648847450).

Almost surely, 2^212644522511 is an apocalyptic number.

212644522511 is a deficient number, since it is larger than the sum of its proper divisors (1950867289).

212644522511 is a wasteful number, since it uses less digits than its factorization.

212644522511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1950867288.

The product of its digits is 38400, while the sum is 35.

Adding to 212644522511 its reverse (115225446212), we get a palindrome (327869968723).

The spelling of 212644522511 in words is "two hundred twelve billion, six hundred forty-four million, five hundred twenty-two thousand, five hundred eleven".