52221021 has 8 divisors (see below), whose sum is σ = 69669600. Its totient is φ = 34793232.

The previous prime is 52221011. The next prime is 52221031. The reversal of 52221021 is 12012225.

It is an interprime number because it is at equal distance from previous prime (52221011) and next prime (52221031).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 52221021 - 2⁵ = 52220989 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52221011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2151 + ... + 10443.

It is an arithmetic number, because the mean of its divisors is an integer number (8708700).

Almost surely, 2^52221021 is an apocalyptic number.

It is an amenable number.

52221021 is a deficient number, since it is larger than the sum of its proper divisors (17448579).

52221021 is a wasteful number, since it uses less digits than its factorization.

52221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10395.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 52221021 is about 7226.4113500409. The cubic root of 52221021 is about 373.7791908685.

Adding to 52221021 its reverse (12012225), we get a palindrome (64233246).

The spelling of 52221021 in words is "fifty-two million, two hundred twenty-one thousand, twenty-one".