53211213 has 24 divisors (see below), whose sum is σ = 87497280. Its totient is φ = 30845760.

The previous prime is 53211203. The next prime is 53211227. The reversal of 53211213 is 31211235.

It is not a de Polignac number, because 53211213 - 2⁵ = 53211181 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53211203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9408 + ... + 13961.

It is an arithmetic number, because the mean of its divisors is an integer number (3645720).

Almost surely, 2^53211213 is an apocalyptic number.

It is an amenable number.

53211213 is a deficient number, since it is larger than the sum of its proper divisors (34286067).

53211213 is a wasteful number, since it uses less digits than its factorization.

53211213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23409 (or 23406 counting only the distinct ones).

The product of its digits is 180, while the sum is 18.

The square root of 53211213 is about 7294.6016340853. The cubic root of 53211213 is about 376.1268929076.

Adding to 53211213 its reverse (31211235), we get a palindrome (84422448).

The spelling of 53211213 in words is "fifty-three million, two hundred eleven thousand, two hundred thirteen".