52111421 has 2 divisors, whose sum is σ = 52111422. Its totient is φ = 52111420.

The previous prime is 52111417. The next prime is 52111427. The reversal of 52111421 is 12411125.

52111421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51768025 + 343396 = 7195^2 + 586^2 .

It is a cyclic number.

It is not a de Polignac number, because 52111421 - 2² = 52111417 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 52111421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52111427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26055710 + 26055711.

It is an arithmetic number, because the mean of its divisors is an integer number (26055711).

Almost surely, 2^52111421 is an apocalyptic number.

It is an amenable number.

52111421 is a deficient number, since it is larger than the sum of its proper divisors (1).

52111421 is an equidigital number, since it uses as much as digits as its factorization.

52111421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80, while the sum is 17.

The square root of 52111421 is about 7218.8240732130. The cubic root of 52111421 is about 373.5175153238.

Adding to 52111421 its reverse (12411125), we get a palindrome (64522546).

The spelling of 52111421 in words is "fifty-two million, one hundred eleven thousand, four hundred twenty-one".