52134221 has 4 divisors (see below), whose sum is σ = 53543292. Its totient is φ = 50725152.

The previous prime is 52134197. The next prime is 52134239. The reversal of 52134221 is 12243125.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50608996 + 1525225 = 7114^2 + 1235^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52134221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 52134193 and 52134202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52134521) 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, 704480 + ... + 704553.

It is an arithmetic number, because the mean of its divisors is an integer number (13385823).

Almost surely, 2^52134221 is an apocalyptic number.

It is an amenable number.

52134221 is a deficient number, since it is larger than the sum of its proper divisors (1409071).

52134221 is a wasteful number, since it uses less digits than its factorization.

52134221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1409070.

The product of its digits is 480, while the sum is 20.

The square root of 52134221 is about 7220.4031050905. The cubic root of 52134221 is about 373.5719816799.

Adding to 52134221 its reverse (12243125), we get a palindrome (64377346).

The spelling of 52134221 in words is "fifty-two million, one hundred thirty-four thousand, two hundred twenty-one".