52281247 has 4 divisors (see below), whose sum is σ = 52431400. Its totient is φ = 52131096.

The previous prime is 52281241. The next prime is 52281263. The reversal of 52281247 is 74218225.

It is a happy number.

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-52281247 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 (52281241) 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, 74553 + ... + 75250.

It is an arithmetic number, because the mean of its divisors is an integer number (13107850).

Almost surely, 2^52281247 is an apocalyptic number.

52281247 is a deficient number, since it is larger than the sum of its proper divisors (150153).

52281247 is a wasteful number, since it uses less digits than its factorization.

52281247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150152.

The product of its digits is 8960, while the sum is 31.

The square root of 52281247 is about 7230.5772245375. The cubic root of 52281247 is about 373.9228276433.

The spelling of 52281247 in words is "fifty-two million, two hundred eighty-one thousand, two hundred forty-seven".