53159521 has 2 divisors, whose sum is σ = 53159522. Its totient is φ = 53159520.

The previous prime is 53159503. The next prime is 53159537. The reversal of 53159521 is 12595135.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44957025 + 8202496 = 6705^2 + 2864^2 .

It is a cyclic number.

It is not a de Polignac number, because 53159521 - 2⁹ = 53159009 is a prime.

It is a super-3 number, since 3×53159521³ (a number of 24 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (53159501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26579760 + 26579761.

It is an arithmetic number, because the mean of its divisors is an integer number (26579761).

Almost surely, 2^53159521 is an apocalyptic number.

It is an amenable number.

53159521 is a deficient number, since it is larger than the sum of its proper divisors (1).

53159521 is an equidigital number, since it uses as much as digits as its factorization.

53159521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6750, while the sum is 31.

The square root of 53159521 is about 7291.0576050392. The cubic root of 53159521 is about 376.0050573675.

The spelling of 53159521 in words is "fifty-three million, one hundred fifty-nine thousand, five hundred twenty-one".