53021393 has 2 divisors, whose sum is σ = 53021394. Its totient is φ = 53021392.

The previous prime is 53021363. The next prime is 53021431. The reversal of 53021393 is 39312035.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41576704 + 11444689 = 6448^2 + 3383^2 .

It is a cyclic number.

It is not a de Polignac number, because 53021393 - 2¹⁰ = 53020369 is a prime.

It is a super-2 number, since 2×53021393² = 5622536231320898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (53021303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26510696 + 26510697.

It is an arithmetic number, because the mean of its divisors is an integer number (26510697).

Almost surely, 2^53021393 is an apocalyptic number.

It is an amenable number.

53021393 is a deficient number, since it is larger than the sum of its proper divisors (1).

53021393 is an equidigital number, since it uses as much as digits as its factorization.

53021393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2430, while the sum is 26.

The square root of 53021393 is about 7281.5790183174. The cubic root of 53021393 is about 375.6791083854.

The spelling of 53021393 in words is "fifty-three million, twenty-one thousand, three hundred ninety-three".