52670021 has 2 divisors, whose sum is σ = 52670022. Its totient is φ = 52670020.

The previous prime is 52669993. The next prime is 52670039. The reversal of 52670021 is 12007625.

52670021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34093921 + 18576100 = 5839^2 + 4310^2 .

It is a cyclic number.

It is not a de Polignac number, because 52670021 - 2¹⁰ = 52668997 is a prime.

It is a super-2 number, since 2×52670021² = 5548262224280882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52670041) 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, 26335010 + 26335011.

It is an arithmetic number, because the mean of its divisors is an integer number (26335011).

Almost surely, 2^52670021 is an apocalyptic number.

It is an amenable number.

52670021 is a deficient number, since it is larger than the sum of its proper divisors (1).

52670021 is an equidigital number, since it uses as much as digits as its factorization.

52670021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 52670021 is about 7257.4114531284. The cubic root of 52670021 is about 374.8473950916.

Adding to 52670021 its reverse (12007625), we get a palindrome (64677646).

The spelling of 52670021 in words is "fifty-two million, six hundred seventy thousand, twenty-one".