52507213 has 4 divisors (see below), whose sum is σ = 57280608. Its totient is φ = 47733820.

The previous prime is 52507201. The next prime is 52507219. The reversal of 52507213 is 31270525.

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 a de Polignac number, because none of the positive numbers 2^k-52507213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52507219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2386681 + ... + 2386702.

It is an arithmetic number, because the mean of its divisors is an integer number (14320152).

Almost surely, 2^52507213 is an apocalyptic number.

It is an amenable number.

52507213 is a deficient number, since it is larger than the sum of its proper divisors (4773395).

52507213 is a wasteful number, since it uses less digits than its factorization.

52507213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4773394.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 52507213 is about 7246.1861002875. The cubic root of 52507213 is about 374.4607669047.

Adding to 52507213 its reverse (31270525), we get a palindrome (83777738).

The spelling of 52507213 in words is "fifty-two million, five hundred seven thousand, two hundred thirteen".