52213121 has 4 divisors (see below), whose sum is σ = 54961200. Its totient is φ = 49465044.

The previous prime is 52213093. The next prime is 52213123. The reversal of 52213121 is 12131225.

It is a happy number.

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-52213121 is a prime.

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 52213121.

It is not an unprimeable number, because it can be changed into a prime (52213123) 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, 1374011 + ... + 1374048.

It is an arithmetic number, because the mean of its divisors is an integer number (13740300).

Almost surely, 2^52213121 is an apocalyptic number.

It is an amenable number.

52213121 is a deficient number, since it is larger than the sum of its proper divisors (2748079).

52213121 is a wasteful number, since it uses less digits than its factorization.

52213121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2748078.

The product of its digits is 120, while the sum is 17.

The square root of 52213121 is about 7225.8647233393. The cubic root of 52213121 is about 373.7603414699.

Adding to 52213121 its reverse (12131225), we get a palindrome (64344346).

The spelling of 52213121 in words is "fifty-two million, two hundred thirteen thousand, one hundred twenty-one".