52210421 has 2 divisors, whose sum is σ = 52210422. Its totient is φ = 52210420.

The previous prime is 52210409. The next prime is 52210429. The reversal of 52210421 is 12401225.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37039396 + 15171025 = 6086^2 + 3895^2 .

It is a cyclic number.

It is not a de Polignac number, because 52210421 - 2⁶ = 52210357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 52210421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52210429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26105210 + 26105211.

It is an arithmetic number, because the mean of its divisors is an integer number (26105211).

Almost surely, 2^52210421 is an apocalyptic number.

It is an amenable number.

52210421 is a deficient number, since it is larger than the sum of its proper divisors (1).

52210421 is an equidigital number, since it uses as much as digits as its factorization.

52210421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 52210421 is about 7225.6778920735. The cubic root of 52210421 is about 373.7538988344.

Adding to 52210421 its reverse (12401225), we get a palindrome (64611646).

The spelling of 52210421 in words is "fifty-two million, two hundred ten thousand, four hundred twenty-one".