51173900 has 36 divisors (see below), whose sum is σ = 111815760. Its totient is φ = 20328000.

The previous prime is 51173887. The next prime is 51173921. The reversal of 51173900 is 937115.

It is a self number, because there is not a number n which added to its sum of digits gives 51173900.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13406 + ... + 16794.

Almost surely, 2^51173900 is an apocalyptic number.

51173900 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 51173900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55907880).

51173900 is an abundant number, since it is smaller than the sum of its proper divisors (60641860).

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

51173900 is a wasteful number, since it uses less digits than its factorization.

51173900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3554 (or 3547 counting only the distinct ones).

The product of its (nonzero) digits is 945, while the sum is 26.

The square root of 51173900 is about 7153.5935025692. The cubic root of 51173900 is about 371.2639993663.

The spelling of 51173900 in words is "fifty-one million, one hundred seventy-three thousand, nine hundred".