53280247 has 4 divisors (see below), whose sum is σ = 53347896. Its totient is φ = 53212600.

The previous prime is 53280233. The next prime is 53280251. The reversal of 53280247 is 74208235.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53280247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53280347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32629 + ... + 34222.

It is an arithmetic number, because the mean of its divisors is an integer number (13336974).

Almost surely, 2^53280247 is an apocalyptic number.

53280247 is a deficient number, since it is larger than the sum of its proper divisors (67649).

53280247 is an equidigital number, since it uses as much as digits as its factorization.

53280247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67648.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 53280247 is about 7299.3319557340. The cubic root of 53280247 is about 376.2894797114.

The spelling of 53280247 in words is "fifty-three million, two hundred eighty thousand, two hundred forty-seven".