53893281 has 32 divisors (see below), whose sum is σ = 84792960. Its totient is φ = 30127104.

The previous prime is 53893277. The next prime is 53893289. The reversal of 53893281 is 18239835.

It is not a de Polignac number, because 53893281 - 2² = 53893277 is a prime.

It is a super-2 number, since 2×53893281² = 5808971473889922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (53893289) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17826 + ... + 20628.

It is an arithmetic number, because the mean of its divisors is an integer number (2649780).

Almost surely, 2^53893281 is an apocalyptic number.

53893281 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

53893281 is a deficient number, since it is larger than the sum of its proper divisors (30899679).

53893281 is a wasteful number, since it uses less digits than its factorization.

53893281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2865.

The product of its digits is 51840, while the sum is 39.

The square root of 53893281 is about 7341.2043289913. The cubic root of 53893281 is about 377.7271553628.

The spelling of 53893281 in words is "fifty-three million, eight hundred ninety-three thousand, two hundred eighty-one".