2285528721 has 8 divisors (see below), whose sum is σ = 3482710464. Its totient is φ = 1306016400.

The previous prime is 2285528719. The next prime is 2285528741. The reversal of 2285528721 is 1278255822.

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

It is not a de Polignac number, because 2285528721 - 2¹ = 2285528719 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2285528741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54417330 + ... + 54417371.

It is an arithmetic number, because the mean of its divisors is an integer number (435338808).

Almost surely, 2^2285528721 is an apocalyptic number.

2285528721 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2285528721 is a deficient number, since it is larger than the sum of its proper divisors (1197181743).

2285528721 is a wasteful number, since it uses less digits than its factorization.

2285528721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108834711.

The product of its digits is 179200, while the sum is 42.

The square root of 2285528721 is about 47807.2036517511. The cubic root of 2285528721 is about 1317.2318637898.

The spelling of 2285528721 in words is "two billion, two hundred eighty-five million, five hundred twenty-eight thousand, seven hundred twenty-one".