53399281 has 8 divisors (see below), whose sum is σ = 58295720. Its totient is φ = 48615552.

The previous prime is 53399263. The next prime is 53399293. The reversal of 53399281 is 18299335.

It can be written as a sum of positive squares in 4 ways, for example, as 16128256 + 37271025 = 4016^2 + 6105^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53399281 - 2⁷ = 53399153 is a prime.

It is a super-2 number, since 2×53399281² = 5702966422633922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53399581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27186 + ... + 29083.

It is an arithmetic number, because the mean of its divisors is an integer number (7286965).

Almost surely, 2^53399281 is an apocalyptic number.

It is an amenable number.

53399281 is a deficient number, since it is larger than the sum of its proper divisors (4896439).

53399281 is a wasteful number, since it uses less digits than its factorization.

53399281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56355.

The product of its digits is 58320, while the sum is 40.

The square root of 53399281 is about 7307.4811665854. The cubic root of 53399281 is about 376.5694954745.

The spelling of 53399281 in words is "fifty-three million, three hundred ninety-nine thousand, two hundred eighty-one".