212236513 has 4 divisors (see below), whose sum is σ = 213163540. Its totient is φ = 211309488.

The previous prime is 212236501. The next prime is 212236543. The reversal of 212236513 is 315632212.

212236513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 127080529 + 85155984 = 11273^2 + 9228^2 .

It is a cyclic number.

It is not a de Polignac number, because 212236513 - 2⁹ = 212236001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212236543) 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, 463170 + ... + 463627.

It is an arithmetic number, because the mean of its divisors is an integer number (53290885).

Almost surely, 2^212236513 is an apocalyptic number.

It is an amenable number.

212236513 is a deficient number, since it is larger than the sum of its proper divisors (927027).

212236513 is an equidigital number, since it uses as much as digits as its factorization.

212236513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927026.

The product of its digits is 2160, while the sum is 25.

The square root of 212236513 is about 14568.3394043384. The cubic root of 212236513 is about 596.4948529293.

Adding to 212236513 its reverse (315632212), we get a palindrome (527868725).

The spelling of 212236513 in words is "two hundred twelve million, two hundred thirty-six thousand, five hundred thirteen".