521271053 has 2 divisors, whose sum is σ = 521271054. Its totient is φ = 521271052.

The previous prime is 521271041. The next prime is 521271073. The reversal of 521271053 is 350172125.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 397683364 + 123587689 = 19942^2 + 11117^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-521271053 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521271013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260635526 + 260635527.

It is an arithmetic number, because the mean of its divisors is an integer number (260635527).

Almost surely, 2^521271053 is an apocalyptic number.

It is an amenable number.

521271053 is a deficient number, since it is larger than the sum of its proper divisors (1).

521271053 is an equidigital number, since it uses as much as digits as its factorization.

521271053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 521271053 is about 22831.3611727378. The cubic root of 521271053 is about 804.7998180277.

The spelling of 521271053 in words is "five hundred twenty-one million, two hundred seventy-one thousand, fifty-three".