52251213 has 16 divisors (see below), whose sum is σ = 82190336. Its totient is φ = 28894320.

The previous prime is 52251211. The next prime is 52251253. The reversal of 52251213 is 31215225.

52251213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 52251213 - 2¹ = 52251211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is the 7229-th Hogben number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 52251213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52251211) by changing a digit.

It is a nontrivial repunit in base 7228.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39481 + ... + 40782.

It is an arithmetic number, because the mean of its divisors is an integer number (5136896).

Almost surely, 2^52251213 is an apocalyptic number.

It is an amenable number.

52251213 is a deficient number, since it is larger than the sum of its proper divisors (29939123).

52251213 is a wasteful number, since it uses less digits than its factorization.

52251213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80304.

The product of its digits is 600, while the sum is 21.

The square root of 52251213 is about 7228.5000518780. The cubic root of 52251213 is about 373.8512114645.

Adding to 52251213 its reverse (31215225), we get a palindrome (83466438).

The spelling of 52251213 in words is "fifty-two million, two hundred fifty-one thousand, two hundred thirteen".