53113281 has 8 divisors (see below), whose sum is σ = 76265280. Its totient is φ = 32685072.

The previous prime is 53113273. The next prime is 53113301. The reversal of 53113281 is 18231135.

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

It is not a de Polignac number, because 53113281 - 2³ = 53113273 is a prime.

It is a super-2 number, since 2×53113281² = 5642041237169922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (53113271) 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, 680901 + ... + 680978.

It is an arithmetic number, because the mean of its divisors is an integer number (9533160).

Almost surely, 2^53113281 is an apocalyptic number.

It is an amenable number.

53113281 is a deficient number, since it is larger than the sum of its proper divisors (23151999).

53113281 is a wasteful number, since it uses less digits than its factorization.

53113281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361895.

The product of its digits is 720, while the sum is 24.

The square root of 53113281 is about 7287.8859074494. The cubic root of 53113281 is about 375.8960049840.

The spelling of 53113281 in words is "fifty-three million, one hundred thirteen thousand, two hundred eighty-one".