51553866100 has 36 divisors (see below), whose sum is σ = 122042063808. Its totient is φ = 18746860000.

The previous prime is 51553866083. The next prime is 51553866107. The reversal of 51553866100 is 166835515.

It is a super-2 number, since 2×51553866100² (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 (51553866107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23432476 + ... + 23434675.

It is an arithmetic number, because the mean of its divisors is an integer number (3390057328).

Almost surely, 2^51553866100 is an apocalyptic number.

51553866100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51553866100 is an abundant number, since it is smaller than the sum of its proper divisors (70488197708).

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

51553866100 is a wasteful number, since it uses less digits than its factorization.

51553866100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46867176 (or 46867169 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 40.

The spelling of 51553866100 in words is "fifty-one billion, five hundred fifty-three million, eight hundred sixty-six thousand, one hundred".