5001100561 has 4 divisors (see below), whose sum is σ = 5264316400. Its totient is φ = 4737884724.

The previous prime is 5001100529. The next prime is 5001100567. The reversal of 5001100561 is 1650011005.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1650011005 = 5 ⋅330002201.

It is a cyclic number.

It is not a de Polignac number, because 5001100561 - 2⁵ = 5001100529 is a prime.

It is a super-2 number, since 2×5001100561² = 50022013642469029442, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 263215819 = 5001100561 / (5 + 0 + 0 + 1 + 1 + 0 + 0 + 5 + 6 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5001100567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131607891 + ... + 131607928.

It is an arithmetic number, because the mean of its divisors is an integer number (1316079100).

Almost surely, 2^5001100561 is an apocalyptic number.

It is an amenable number.

5001100561 is a deficient number, since it is larger than the sum of its proper divisors (263215839).

5001100561 is a wasteful number, since it uses less digits than its factorization.

5001100561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263215838.

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

The square root of 5001100561 is about 70718.4598319279. The cubic root of 5001100561 is about 1710.1013996618.

Adding to 5001100561 its reverse (1650011005), we get a palindrome (6651111566).

The spelling of 5001100561 in words is "five billion, one million, one hundred thousand, five hundred sixty-one".