52525021 has 2 divisors, whose sum is σ = 52525022. Its totient is φ = 52525020.

The previous prime is 52525001. The next prime is 52525027. The reversal of 52525021 is 12052525.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31922500 + 20602521 = 5650^2 + 4539^2 .

It is a cyclic number.

It is not a de Polignac number, because 52525021 - 2¹³ = 52516829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 52524983 and 52525001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52525027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26262510 + 26262511.

It is an arithmetic number, because the mean of its divisors is an integer number (26262511).

Almost surely, 2^52525021 is an apocalyptic number.

It is an amenable number.

52525021 is a deficient number, since it is larger than the sum of its proper divisors (1).

52525021 is an equidigital number, since it uses as much as digits as its factorization.

52525021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 52525021 is about 7247.4147804579. The cubic root of 52525021 is about 374.5030953343.

Adding to 52525021 its reverse (12052525), we get a palindrome (64577546).

The spelling of 52525021 in words is "fifty-two million, five hundred twenty-five thousand, twenty-one".