52125221 has 2 divisors, whose sum is σ = 52125222. Its totient is φ = 52125220.

The previous prime is 52125197. The next prime is 52125251. The reversal of 52125221 is 12252125.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30129121 + 21996100 = 5489^2 + 4690^2 .

It is a cyclic number.

It is not a de Polignac number, because 52125221 - 2²² = 47930917 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 52125193 and 52125202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52125251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26062610 + 26062611.

It is an arithmetic number, because the mean of its divisors is an integer number (26062611).

Almost surely, 2^52125221 is an apocalyptic number.

It is an amenable number.

52125221 is a deficient number, since it is larger than the sum of its proper divisors (1).

52125221 is an equidigital number, since it uses as much as digits as its factorization.

52125221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 400, while the sum is 20.

The square root of 52125221 is about 7219.7798442889. The cubic root of 52125221 is about 373.5504836999.

Adding to 52125221 its reverse (12252125), we get a palindrome (64377346).

The spelling of 52125221 in words is "fifty-two million, one hundred twenty-five thousand, two hundred twenty-one".