51111103542 has 8 divisors (see below), whose sum is σ = 102222207096. Its totient is φ = 17037034512.

The previous prime is 51111103541. The next prime is 51111103651. The reversal of 51111103542 is 24530111115.

It is a sphenic number, since it is the product of 3 distinct primes.

51111103542 is an admirable number.

It is a super-2 number, since 2×51111103542² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51111103541) 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, 4259258623 + ... + 4259258634.

It is an arithmetic number, because the mean of its divisors is an integer number (12777775887).

Almost surely, 2^51111103542 is an apocalyptic number.

51111103542 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51111103542 is a wasteful number, since it uses less digits than its factorization.

51111103542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8518517262.

The product of its (nonzero) digits is 600, while the sum is 24.

Adding to 51111103542 its reverse (24530111115), we get a palindrome (75641214657).

The spelling of 51111103542 in words is "fifty-one billion, one hundred eleven million, one hundred three thousand, five hundred forty-two".