8227561 has 12 divisors (see below), whose sum is σ = 8760780. Its totient is φ = 7716800.

The previous prime is 8227559. The next prime is 8227573. The reversal of 8227561 is 1657228.

It can be written as a sum of positive squares in 6 ways, for example, as 2131600 + 6095961 = 1460^2 + 2469^2 .

It is not a de Polignac number, because 8227561 - 2¹ = 8227559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8227501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 81411 + ... + 81511.

It is an arithmetic number, because the mean of its divisors is an integer number (730065).

Almost surely, 2^8227561 is an apocalyptic number.

It is an amenable number.

8227561 is a deficient number, since it is larger than the sum of its proper divisors (533219).

8227561 is a wasteful number, since it uses less digits than its factorization.

8227561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236 (or 183 counting only the distinct ones).

The product of its digits is 6720, while the sum is 31.

The square root of 8227561 is about 2868.3725350798. The cubic root of 8227561 is about 201.8786399737.

The spelling of 8227561 in words is "eight million, two hundred twenty-seven thousand, five hundred sixty-one".