52247821 has 8 divisors (see below), whose sum is σ = 54144000. Its totient is φ = 50358000.

The previous prime is 52247813. The next prime is 52247831. The reversal of 52247821 is 12874225.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 52247821 - 2³ = 52247813 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 (52247831) 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, 20580 + ... + 22978.

It is an arithmetic number, because the mean of its divisors is an integer number (6768000).

Almost surely, 2^52247821 is an apocalyptic number.

It is an amenable number.

52247821 is a deficient number, since it is larger than the sum of its proper divisors (1896179).

52247821 is a wasteful number, since it uses less digits than its factorization.

52247821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3179.

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

The square root of 52247821 is about 7228.2654212473. The cubic root of 52247821 is about 373.8431215040.

The spelling of 52247821 in words is "fifty-two million, two hundred forty-seven thousand, eight hundred twenty-one".