53863281 has 12 divisors (see below), whose sum is σ = 77866308. Its totient is φ = 35879424.

The previous prime is 53863267. The next prime is 53863289. The reversal of 53863281 is 18236835.

It can be written as a sum of positive squares in 2 ways, for example, as 29062881 + 24800400 = 5391^2 + 4980^2 .

It is not a de Polignac number, because 53863281 - 2⁷ = 53863153 is a prime.

It is a super-2 number, since 2×53863281² = 5802506080169922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (53863289) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19141 + ... + 21773.

It is an arithmetic number, because the mean of its divisors is an integer number (6488859).

Almost surely, 2^53863281 is an apocalyptic number.

It is an amenable number.

53863281 is a deficient number, since it is larger than the sum of its proper divisors (24003027).

53863281 is a wasteful number, since it uses less digits than its factorization.

53863281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4912 (or 4909 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 53863281 is about 7339.1607830869. The cubic root of 53863281 is about 377.6570543673.

The spelling of 53863281 in words is "fifty-three million, eight hundred sixty-three thousand, two hundred eighty-one".