52531213 has 4 divisors (see below), whose sum is σ = 60035680. Its totient is φ = 45026748.

The previous prime is 52531189. The next prime is 52531247. The reversal of 52531213 is 31213525.

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.

It is a cyclic number.

It is not a de Polignac number, because 52531213 - 2⁹ = 52530701 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 (52531253) 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, 3752223 + ... + 3752236.

It is an arithmetic number, because the mean of its divisors is an integer number (15008920).

Almost surely, 2^52531213 is an apocalyptic number.

It is an amenable number.

52531213 is a deficient number, since it is larger than the sum of its proper divisors (7504467).

52531213 is an equidigital number, since it uses as much as digits as its factorization.

52531213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7504466.

The product of its digits is 900, while the sum is 22.

The square root of 52531213 is about 7247.8419546786. The cubic root of 52531213 is about 374.5178110641.

Adding to 52531213 its reverse (31213525), we get a palindrome (83744738).

The spelling of 52531213 in words is "fifty-two million, five hundred thirty-one thousand, two hundred thirteen".