53321549 has 2 divisors, whose sum is σ = 53321550. Its totient is φ = 53321548.

The previous prime is 53321533. The next prime is 53321561. The reversal of 53321549 is 94512335.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47513449 + 5808100 = 6893^2 + 2410^2 .

It is a cyclic number.

It is not a de Polignac number, because 53321549 - 2⁴ = 53321533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53321509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26660774 + 26660775.

It is an arithmetic number, because the mean of its divisors is an integer number (26660775).

Almost surely, 2^53321549 is an apocalyptic number.

It is an amenable number.

53321549 is a deficient number, since it is larger than the sum of its proper divisors (1).

53321549 is an equidigital number, since it uses as much as digits as its factorization.

53321549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16200, while the sum is 32.

The square root of 53321549 is about 7302.1605706804. The cubic root of 53321549 is about 376.3866858046.

The spelling of 53321549 in words is "fifty-three million, three hundred twenty-one thousand, five hundred forty-nine".