5111805001 has 4 divisors (see below), whose sum is σ = 5112560592. Its totient is φ = 5111049412.

The previous prime is 5111804959. The next prime is 5111805019. The reversal of 5111805001 is 1005081115.

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: 1005081115 = 5 ⋅201016223.

It is a cyclic number.

It is not a de Polignac number, because 5111805001 - 2¹¹ = 5111802953 is a prime.

It is a super-2 number, since 2×5111805001² = 52261100736497220002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5111895001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 367555 + ... + 381208.

It is an arithmetic number, because the mean of its divisors is an integer number (1278140148).

Almost surely, 2^5111805001 is an apocalyptic number.

It is an amenable number.

5111805001 is a deficient number, since it is larger than the sum of its proper divisors (755591).

5111805001 is an equidigital number, since it uses as much as digits as its factorization.

5111805001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755590.

The product of its (nonzero) digits is 200, while the sum is 22.

The square root of 5111805001 is about 71496.8880511593. Note that the first 3 decimals coincide. The cubic root of 5111805001 is about 1722.6276989902.

Adding to 5111805001 its reverse (1005081115), we get a palindrome (6116886116).

The spelling of 5111805001 in words is "five billion, one hundred eleven million, eight hundred five thousand, one".