5635561 has 2 divisors, whose sum is σ = 5635562. Its totient is φ = 5635560.

The previous prime is 5635549. The next prime is 5635589. The reversal of 5635561 is 1655365.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3515625 + 2119936 = 1875^2 + 1456^2 .

It is a cyclic number.

It is not a de Polignac number, because 5635561 - 2¹¹ = 5633513 is a prime.

It is not a weakly prime, because it can be changed into another prime (5635501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2817780 + 2817781.

It is an arithmetic number, because the mean of its divisors is an integer number (2817781).

Almost surely, 2^5635561 is an apocalyptic number.

It is an amenable number.

5635561 is a deficient number, since it is larger than the sum of its proper divisors (1).

5635561 is an equidigital number, since it uses as much as digits as its factorization.

5635561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13500, while the sum is 31.

The square root of 5635561 is about 2373.9336553493. The cubic root of 5635561 is about 177.9558974186.

The spelling of 5635561 in words is "five million, six hundred thirty-five thousand, five hundred sixty-one".