52284721 has 4 divisors (see below), whose sum is σ = 52390000. Its totient is φ = 52179444.

The previous prime is 52284719. The next prime is 52284731. The reversal of 52284721 is 12748225.

It is a happy number.

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 52284721 - 2¹ = 52284719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52284731) 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, 51891 + ... + 52888.

It is an arithmetic number, because the mean of its divisors is an integer number (13097500).

Almost surely, 2^52284721 is an apocalyptic number.

It is an amenable number.

52284721 is a deficient number, since it is larger than the sum of its proper divisors (105279).

52284721 is a wasteful number, since it uses less digits than its factorization.

52284721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105278.

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

The square root of 52284721 is about 7230.8174503302. The cubic root of 52284721 is about 373.9311096387.

The spelling of 52284721 in words is "fifty-two million, two hundred eighty-four thousand, seven hundred twenty-one".