5105551111 has 4 divisors (see below), whose sum is σ = 5156101224. Its totient is φ = 5055001000.

The previous prime is 5105551057. The next prime is 5105551151. The reversal of 5105551111 is 1111555015.

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 5105551111 - 2⁹ = 5105550599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5105551151) 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, 25274905 + ... + 25275106.

It is an arithmetic number, because the mean of its divisors is an integer number (1289025306).

Almost surely, 2^5105551111 is an apocalyptic number.

5105551111 is a deficient number, since it is larger than the sum of its proper divisors (50550113).

5105551111 is a wasteful number, since it uses less digits than its factorization.

5105551111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50550112.

The product of its (nonzero) digits is 625, while the sum is 25.

The square root of 5105551111 is about 71453.1392662352. The cubic root of 5105551111 is about 1721.9249126305.

The spelling of 5105551111 in words is "five billion, one hundred five million, five hundred fifty-one thousand, one hundred eleven".