5105561 has 2 divisors, whose sum is σ = 5105562. Its totient is φ = 5105560.

The previous prime is 5105531. The next prime is 5105587. The reversal of 5105561 is 1655015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5040025 + 65536 = 2245^2 + 256^2 .

It is a cyclic number.

It is not a de Polignac number, because 5105561 - 2⁶ = 5105497 is a prime.

It is not a weakly prime, because it can be changed into another prime (5105531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2552780 + 2552781.

It is an arithmetic number, because the mean of its divisors is an integer number (2552781).

Almost surely, 2^5105561 is an apocalyptic number.

It is an amenable number.

5105561 is a deficient number, since it is larger than the sum of its proper divisors (1).

5105561 is an equidigital number, since it uses as much as digits as its factorization.

5105561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 5105561 is about 2259.5488487749. The cubic root of 5105561 is about 172.1926024368.

The spelling of 5105561 in words is "five million, one hundred five thousand, five hundred sixty-one".