51550110111 has 16 divisors (see below), whose sum is σ = 70057249920. Its totient is φ = 33705353760.

The previous prime is 51550110109. The next prime is 51550110137. The reversal of 51550110111 is 11101105515.

It is not a de Polignac number, because 51550110111 - 2¹ = 51550110109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51550110181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 361816 + ... + 483746.

It is an arithmetic number, because the mean of its divisors is an integer number (4378578120).

Almost surely, 2^51550110111 is an apocalyptic number.

51550110111 is a deficient number, since it is larger than the sum of its proper divisors (18507139809).

51550110111 is a wasteful number, since it uses less digits than its factorization.

51550110111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124646.

The product of its (nonzero) digits is 125, while the sum is 21.

Adding to 51550110111 its reverse (11101105515), we get a palindrome (62651215626).

The spelling of 51550110111 in words is "fifty-one billion, five hundred fifty million, one hundred ten thousand, one hundred eleven".