52756021 has 2 divisors, whose sum is σ = 52756022. Its totient is φ = 52756020.

The previous prime is 52756013. The next prime is 52756031. The reversal of 52756021 is 12065725.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35533521 + 17222500 = 5961^2 + 4150^2 .

It is a cyclic number.

It is not a de Polignac number, because 52756021 - 2³ = 52756013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52756031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26378010 + 26378011.

It is an arithmetic number, because the mean of its divisors is an integer number (26378011).

Almost surely, 2^52756021 is an apocalyptic number.

It is an amenable number.

52756021 is a deficient number, since it is larger than the sum of its proper divisors (1).

52756021 is an equidigital number, since it uses as much as digits as its factorization.

52756021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 52756021 is about 7263.3340140737. The cubic root of 52756021 is about 375.0513020183.

The spelling of 52756021 in words is "fifty-two million, seven hundred fifty-six thousand, twenty-one".