52221443 has 4 divisors (see below), whose sum is σ = 54969960. Its totient is φ = 49472928.

The previous prime is 52221409. The next prime is 52221461. The reversal of 52221443 is 34412225.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 52221443 - 2²² = 48027139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52221493) 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, 1374230 + ... + 1374267.

It is an arithmetic number, because the mean of its divisors is an integer number (13742490).

Almost surely, 2^52221443 is an apocalyptic number.

52221443 is a deficient number, since it is larger than the sum of its proper divisors (2748517).

52221443 is a wasteful number, since it uses less digits than its factorization.

52221443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2748516.

The product of its digits is 1920, while the sum is 23.

The square root of 52221443 is about 7226.4405484305. The cubic root of 52221443 is about 373.7801977070.

Adding to 52221443 its reverse (34412225), we get a palindrome (86633668).

The spelling of 52221443 in words is "fifty-two million, two hundred twenty-one thousand, four hundred forty-three".