53278247 has 16 divisors (see below), whose sum is σ = 60327168. Its totient is φ = 46630080.

The previous prime is 53278217. The next prime is 53278271. The reversal of 53278247 is 74287235.

It is a cyclic number.

It is not a de Polignac number, because 53278247 - 2¹⁴ = 53261863 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53278247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53278217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33758 + ... + 35300.

It is an arithmetic number, because the mean of its divisors is an integer number (3770448).

Almost surely, 2^53278247 is an apocalyptic number.

53278247 is a deficient number, since it is larger than the sum of its proper divisors (7048921).

53278247 is a wasteful number, since it uses less digits than its factorization.

53278247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1670.

The product of its digits is 94080, while the sum is 38.

The square root of 53278247 is about 7299.1949556098. The cubic root of 53278247 is about 376.2847713475.

The spelling of 53278247 in words is "fifty-three million, two hundred seventy-eight thousand, two hundred forty-seven".