42525000521 has 2 divisors, whose sum is σ = 42525000522. Its totient is φ = 42525000520.

The previous prime is 42525000503. The next prime is 42525000533. The reversal of 42525000521 is 12500052524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26764960000 + 15760040521 = 163600^2 + 125539^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42525000521 is a prime.

It is a super-2 number, since 2×42525000521² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42525000571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21262500260 + 21262500261.

It is an arithmetic number, because the mean of its divisors is an integer number (21262500261).

Almost surely, 2^42525000521 is an apocalyptic number.

It is an amenable number.

42525000521 is a deficient number, since it is larger than the sum of its proper divisors (1).

42525000521 is an equidigital number, since it uses as much as digits as its factorization.

42525000521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4000, while the sum is 26.

The spelling of 42525000521 in words is "forty-two billion, five hundred twenty-five million, five hundred twenty-one", and thus it is an aban number.