52211421 has 24 divisors (see below), whose sum is σ = 76858496. Its totient is φ = 34149600.

The previous prime is 52211389. The next prime is 52211443. The reversal of 52211421 is 12411225.

52211421 is a `hidden beast` number, since 522 + 1 + 142 + 1 = 666.

It is not a de Polignac number, because 52211421 - 2⁵ = 52211389 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 52211394 and 52211403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52211461) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 139791 + ... + 140163.

Almost surely, 2^52211421 is an apocalyptic number.

It is an amenable number.

52211421 is a deficient number, since it is larger than the sum of its proper divisors (24647075).

52211421 is a wasteful number, since it uses less digits than its factorization.

52211421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633 (or 630 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 52211421 is about 7225.7470894019. The cubic root of 52211421 is about 373.7562850216.

Adding to 52211421 its reverse (12411225), we get a palindrome (64622646).

The spelling of 52211421 in words is "fifty-two million, two hundred eleven thousand, four hundred twenty-one".