51166100205 has 48 divisors (see below), whose sum is σ = 96806376576. Its totient is φ = 24793464960.

The previous prime is 51166100203. The next prime is 51166100221. The reversal of 51166100205 is 50200166115.

It is a happy number.

It is not a de Polignac number, because 51166100205 - 2¹ = 51166100203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51166100203) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 853599 + ... + 911571.

It is an arithmetic number, because the mean of its divisors is an integer number (2016799512).

Almost surely, 2^51166100205 is an apocalyptic number.

51166100205 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

51166100205 is a deficient number, since it is larger than the sum of its proper divisors (45640276371).

51166100205 is a wasteful number, since it uses less digits than its factorization.

51166100205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59778 (or 59775 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The spelling of 51166100205 in words is "fifty-one billion, one hundred sixty-six million, one hundred thousand, two hundred five".