8818521 has 8 divisors (see below), whose sum is σ = 11774880. Its totient is φ = 5870592.

The previous prime is 8818507. The next prime is 8818531. The reversal of 8818521 is 1258188.

8818521 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 8818521 - 2⁹ = 8818009 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (8818531) 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, 985 + ... + 4313.

It is an arithmetic number, because the mean of its divisors is an integer number (1471860).

Almost surely, 2^8818521 is an apocalyptic number.

It is an amenable number.

8818521 is a deficient number, since it is larger than the sum of its proper divisors (2956359).

8818521 is a wasteful number, since it uses less digits than its factorization.

8818521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4215.

The product of its digits is 5120, while the sum is 33.

The square root of 8818521 is about 2969.5994679418. The cubic root of 8818521 is about 206.6007614457.

It can be divided in two parts, 8818 and 521, that added together give a palindrome (9339).

The spelling of 8818521 in words is "eight million, eight hundred eighteen thousand, five hundred twenty-one".