212243256013 has 4 divisors (see below), whose sum is σ = 212244387040. Its totient is φ = 212242124988.

The previous prime is 212243255993. The next prime is 212243256023. The reversal of 212243256013 is 310652342212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 212243256013 - 2⁵ = 212243255981 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 (212243256023) 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, 209193 + ... + 684286.

It is an arithmetic number, because the mean of its divisors is an integer number (53061096760).

Almost surely, 2^212243256013 is an apocalyptic number.

It is an amenable number.

212243256013 is a deficient number, since it is larger than the sum of its proper divisors (1131027).

212243256013 is an equidigital number, since it uses as much as digits as its factorization.

212243256013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1131026.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 212243256013 its reverse (310652342212), we get a palindrome (522895598225).

The spelling of 212243256013 in words is "two hundred twelve billion, two hundred forty-three million, two hundred fifty-six thousand, thirteen".