53381281 has 2 divisors, whose sum is σ = 53381282. Its totient is φ = 53381280.

The previous prime is 53381261. The next prime is 53381297. The reversal of 53381281 is 18218335.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42458256 + 10923025 = 6516^2 + 3305^2 .

It is a cyclic number.

It is not a de Polignac number, because 53381281 - 2¹¹ = 53379233 is a prime.

It is a super-2 number, since 2×53381281² = 5699122322401922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (53381261) 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, 26690640 + 26690641.

It is an arithmetic number, because the mean of its divisors is an integer number (26690641).

Almost surely, 2^53381281 is an apocalyptic number.

It is an amenable number.

53381281 is a deficient number, since it is larger than the sum of its proper divisors (1).

53381281 is an equidigital number, since it uses as much as digits as its factorization.

53381281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 31.

The square root of 53381281 is about 7306.2494482463. The cubic root of 53381281 is about 376.5271789704.

The spelling of 53381281 in words is "fifty-three million, three hundred eighty-one thousand, two hundred eighty-one".