51199800 has 48 divisors (see below), whose sum is σ = 158721240. Its totient is φ = 13653120.

The previous prime is 51199793. The next prime is 51199861. The reversal of 51199800 is 899115.

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, 42067 + ... + 43266.

Almost surely, 2^51199800 is an apocalyptic number.

51199800 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51199800 is an abundant number, since it is smaller than the sum of its proper divisors (107521440).

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

51199800 is a wasteful number, since it uses less digits than its factorization.

51199800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85352 (or 85343 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 33.

The square root of 51199800 is about 7155.4035525608. The cubic root of 51199800 is about 371.3266231896.

The spelling of 51199800 in words is "fifty-one million, one hundred ninety-nine thousand, eight hundred".