52910021 has 2 divisors, whose sum is σ = 52910022. Its totient is φ = 52910020.

The previous prime is 52909993. The next prime is 52910027. The reversal of 52910021 is 12001925.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52852900 + 57121 = 7270^2 + 239^2 .

It is a cyclic number.

It is not a de Polignac number, because 52910021 - 2⁶ = 52909957 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 52909975 and 52910002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52910027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26455010 + 26455011.

It is an arithmetic number, because the mean of its divisors is an integer number (26455011).

Almost surely, 2^52910021 is an apocalyptic number.

It is an amenable number.

52910021 is a deficient number, since it is larger than the sum of its proper divisors (1).

52910021 is an equidigital number, since it uses as much as digits as its factorization.

52910021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 52910021 is about 7273.9274810793. The cubic root of 52910021 is about 375.4158846767.

Adding to 52910021 its reverse (12001925), we get a palindrome (64911946).

The spelling of 52910021 in words is "fifty-two million, nine hundred ten thousand, twenty-one".