51105511500 has 96 divisors (see below), whose sum is σ = 150858192576. Its totient is φ = 13441420800.

The previous prime is 51105511489. The next prime is 51105511519. The reversal of 51105511500 is 511550115.

It is a super-2 number, since 2×51105511500² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123859 + ... + 342858.

It is an arithmetic number, because the mean of its divisors is an integer number (1571439506).

Almost surely, 2^51105511500 is an apocalyptic number.

51105511500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51105511500 is an abundant number, since it is smaller than the sum of its proper divisors (99752681076).

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

51105511500 is a wasteful number, since it uses less digits than its factorization.

51105511500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466812 (or 466800 counting only the distinct ones).

The product of its (nonzero) digits is 625, while the sum is 24.

The spelling of 51105511500 in words is "fifty-one billion, one hundred five million, five hundred eleven thousand, five hundred".