51000110011 has 4 divisors (see below), whose sum is σ = 51002261032. Its totient is φ = 50997958992.

The previous prime is 51000109999. The next prime is 51000110033. The reversal of 51000110011 is 11001100015.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51000110011 - 2¹³ = 51000101819 is a prime.

It is a super-2 number, since 2×51000110011² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

51000110011 is a modest number, since divided by 110011 gives 510 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 51000110011.

It is not an unprimeable number, because it can be changed into a prime (51000110411) 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, 1039545 + ... + 1087498.

It is an arithmetic number, because the mean of its divisors is an integer number (12750565258).

Almost surely, 2^51000110011 is an apocalyptic number.

51000110011 is a deficient number, since it is larger than the sum of its proper divisors (2151021).

51000110011 is a wasteful number, since it uses less digits than its factorization.

51000110011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2151020.

The product of its (nonzero) digits is 5, while the sum is 10.

Adding to 51000110011 its reverse (11001100015), we get a palindrome (62001210026).

The spelling of 51000110011 in words is "fifty-one billion, one hundred ten thousand, eleven".