8550521 has 4 divisors (see below), whose sum is σ = 9772032. Its totient is φ = 7329012.

The previous prime is 8550517. The next prime is 8550547. The reversal of 8550521 is 1250558.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1250558 = 2 ⋅625279.

It is a cyclic number.

It is not a de Polignac number, because 8550521 - 2² = 8550517 is a prime.

It is a super-2 number, since 2×8550521² = 146222818742882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8550571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 610745 + ... + 610758.

It is an arithmetic number, because the mean of its divisors is an integer number (2443008).

Almost surely, 2^8550521 is an apocalyptic number.

It is an amenable number.

8550521 is a deficient number, since it is larger than the sum of its proper divisors (1221511).

8550521 is a wasteful number, since it uses less digits than its factorization.

8550521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1221510.

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 8550521 is about 2924.1273912058. The cubic root of 8550521 is about 204.4862886175.

The spelling of 8550521 in words is "eight million, five hundred fifty thousand, five hundred twenty-one".