51542041111 has 16 divisors (see below), whose sum is σ = 57402432000. Its totient is φ = 45886304800.

The previous prime is 51542041093. The next prime is 51542041123. The reversal of 51542041111 is 11114024515.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 51542041111 - 2⁷ = 51542040983 is a prime.

It is a super-2 number, since 2×51542041111² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51542041151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105091 + ... + 337828.

It is an arithmetic number, because the mean of its divisors is an integer number (3587652000).

Almost surely, 2^51542041111 is an apocalyptic number.

51542041111 is a deficient number, since it is larger than the sum of its proper divisors (5860390889).

51542041111 is a wasteful number, since it uses less digits than its factorization.

51542041111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443150.

The product of its (nonzero) digits is 800, while the sum is 25.

Adding to 51542041111 its reverse (11114024515), we get a palindrome (62656065626).

The spelling of 51542041111 in words is "fifty-one billion, five hundred forty-two million, forty-one thousand, one hundred eleven".