53303281 has 2 divisors, whose sum is σ = 53303282. Its totient is φ = 53303280.

The previous prime is 53303269. The next prime is 53303287. The reversal of 53303281 is 18230335.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28143025 + 25160256 = 5305^2 + 5016^2 .

It is a cyclic number.

It is not a de Polignac number, because 53303281 - 2⁵ = 53303249 is a prime.

It is a super-2 number, since 2×53303281² = 5682479530729922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (53303287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26651640 + 26651641.

It is an arithmetic number, because the mean of its divisors is an integer number (26651641).

Almost surely, 2^53303281 is an apocalyptic number.

It is an amenable number.

53303281 is a deficient number, since it is larger than the sum of its proper divisors (1).

53303281 is an equidigital number, since it uses as much as digits as its factorization.

53303281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 53303281 is about 7300.9096008648. The cubic root of 53303281 is about 376.3436974477.

The spelling of 53303281 in words is "fifty-three million, three hundred three thousand, two hundred eighty-one".