51110001100 has 18 divisors (see below), whose sum is σ = 110908702604. Its totient is φ = 20444000400.

The previous prime is 51110001091. The next prime is 51110001119. The reversal of 51110001100 is 110001115.

It is a super-2 number, since 2×51110001100² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 255549906 + ... + 255550105.

Almost surely, 2^51110001100 is an apocalyptic number.

51110001100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51110001100 is an abundant number, since it is smaller than the sum of its proper divisors (59798701504).

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

51110001100 is a wasteful number, since it uses less digits than its factorization.

51110001100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511100025 (or 511100018 counting only the distinct ones).

The product of its (nonzero) digits is 5, while the sum is 10.

Adding to 51110001100 its reverse (110001115), we get a palindrome (51220002215).

The spelling of 51110001100 in words is "fifty-one billion, one hundred ten million, one thousand, one hundred".