8290221 has 4 divisors (see below), whose sum is σ = 11053632. Its totient is φ = 5526812.

The previous prime is 8290153. The next prime is 8290229. The reversal of 8290221 is 1220928.

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 8290221 - 2¹⁸ = 8028077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8290191 and 8290200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8290229) 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, 1381701 + ... + 1381706.

It is an arithmetic number, because the mean of its divisors is an integer number (2763408).

Almost surely, 2^8290221 is an apocalyptic number.

It is an amenable number.

8290221 is a deficient number, since it is larger than the sum of its proper divisors (2763411).

8290221 is a wasteful number, since it uses less digits than its factorization.

8290221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2763410.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 8290221 is about 2879.2743877581. The cubic root of 8290221 is about 202.3898379630.

The spelling of 8290221 in words is "eight million, two hundred ninety thousand, two hundred twenty-one".