51157017200 has 60 divisors (see below), whose sum is σ = 123080736168. Its totient is φ = 20433504000.

The previous prime is 51157017187. The next prime is 51157017203. The reversal of 51157017200 is 271075115.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51157017203) 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, 189179 + ... + 371621.

Almost surely, 2^51157017200 is an apocalyptic number.

51157017200 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51157017200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61540368084).

51157017200 is an abundant number, since it is smaller than the sum of its proper divisors (71923718968).

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

51157017200 is a wasteful number, since it uses less digits than its factorization.

51157017200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183162 (or 183151 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 29.

The spelling of 51157017200 in words is "fifty-one billion, one hundred fifty-seven million, seventeen thousand, two hundred".