53003281 has 4 divisors (see below), whose sum is σ = 53110000. Its totient is φ = 52896564.

The previous prime is 53003267. The next prime is 53003287. The reversal of 53003281 is 18230035.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53003281 - 2⁹ = 53002769 is a prime.

It is a super-2 number, since 2×53003281² = 5618695593529922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53003287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52611 + ... + 53608.

It is an arithmetic number, because the mean of its divisors is an integer number (13277500).

Almost surely, 2^53003281 is an apocalyptic number.

It is an amenable number.

53003281 is a deficient number, since it is larger than the sum of its proper divisors (106719).

53003281 is a wasteful number, since it uses less digits than its factorization.

53003281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106718.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 53003281 is about 7280.3352257983. The cubic root of 53003281 is about 375.6363264405.

The spelling of 53003281 in words is "fifty-three million, three thousand, two hundred eighty-one".