5011561 has 2 divisors, whose sum is σ = 5011562. Its totient is φ = 5011560.

The previous prime is 5011543. The next prime is 5011579. The reversal of 5011561 is 1651105.

It is a balanced prime because it is at equal distance from previous prime (5011543) and next prime (5011579).

It can be written as a sum of positive squares in only one way, i.e., 3240000 + 1771561 = 1800^2 + 1331^2 .

It is a cyclic number.

It is not a de Polignac number, because 5011561 - 2⁵ = 5011529 is a prime.

5011561 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (5011261) 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 as a sum of consecutive naturals, namely, 2505780 + 2505781.

It is an arithmetic number, because the mean of its divisors is an integer number (2505781).

Almost surely, 2^5011561 is an apocalyptic number.

It is an amenable number.

5011561 is a deficient number, since it is larger than the sum of its proper divisors (1).

5011561 is an equidigital number, since it uses as much as digits as its factorization.

5011561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 5011561 is about 2238.6516030861. The cubic root of 5011561 is about 171.1292867664.

Adding to 5011561 its reverse (1651105), we get a palindrome (6662666).

It can be divided in two parts, 50115 and 61, that added together give a square (50176 = 224²).

The spelling of 5011561 in words is "five million, eleven thousand, five hundred sixty-one".