51055551100 has 36 divisors (see below), whose sum is σ = 110800417000. Its totient is φ = 20420400960.

The previous prime is 51055551089. The next prime is 51055551119. The reversal of 51055551100 is 115555015.

It is a super-2 number, since 2×51055551100² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2002231 + ... + 2027569.

Almost surely, 2^51055551100 is an apocalyptic number.

51055551100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51055551100 is an abundant number, since it is smaller than the sum of its proper divisors (59744865900).

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

51055551100 is a wasteful number, since it uses less digits than its factorization.

51055551100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45502 (or 45495 counting only the distinct ones).

The product of its (nonzero) digits is 3125, while the sum is 28.

The spelling of 51055551100 in words is "fifty-one billion, fifty-five million, five hundred fifty-one thousand, one hundred".