5100100561 has 2 divisors, whose sum is σ = 5100100562. Its totient is φ = 5100100560.

The previous prime is 5100100559. The next prime is 5100100571. The reversal of 5100100561 is 1650010015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3329290000 + 1770810561 = 57700^2 + 42081^2 .

It is a cyclic number.

It is not a de Polignac number, because 5100100561 - 2¹ = 5100100559 is a prime.

It is a super-2 number, since 2×5100100561² = 52022051464625029442, which contains 22 as substring.

Together with 5100100559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (5100100571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2550050280 + 2550050281.

It is an arithmetic number, because the mean of its divisors is an integer number (2550050281).

Almost surely, 2^5100100561 is an apocalyptic number.

It is an amenable number.

5100100561 is a deficient number, since it is larger than the sum of its proper divisors (1).

5100100561 is an equidigital number, since it uses as much as digits as its factorization.

5100100561 is an evil number, because the sum of its binary digits is even.

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

The square root of 5100100561 is about 71414.9883497855. The cubic root of 5100100561 is about 1721.3119340972.

Adding to 5100100561 its reverse (1650010015), we get a palindrome (6750110576).

The spelling of 5100100561 in words is "five billion, one hundred million, one hundred thousand, five hundred sixty-one".