51501142111 has 4 divisors (see below), whose sum is σ = 51516261792. Its totient is φ = 51486022432.

The previous prime is 51501142109. The next prime is 51501142127. The reversal of 51501142111 is 11124110515.

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 51501142111 - 2¹ = 51501142109 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 (51501142141) 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, 7554730 + ... + 7561543.

It is an arithmetic number, because the mean of its divisors is an integer number (12879065448).

Almost surely, 2^51501142111 is an apocalyptic number.

51501142111 is a deficient number, since it is larger than the sum of its proper divisors (15119681).

51501142111 is a wasteful number, since it uses less digits than its factorization.

51501142111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15119680.

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

Adding to 51501142111 its reverse (11124110515), we get a palindrome (62625252626).

The spelling of 51501142111 in words is "fifty-one billion, five hundred one million, one hundred forty-two thousand, one hundred eleven".