51947900 has 54 divisors (see below), whose sum is σ = 119054880. Its totient is φ = 19671840.

The previous prime is 51947899. The next prime is 51947911. The reversal of 51947900 is 974915.

51947900 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 35381 + ... + 36819.

It is an arithmetic number, because the mean of its divisors is an integer number (2204720).

Almost surely, 2^51947900 is an apocalyptic number.

51947900 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 51947900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59527440).

51947900 is an abundant number, since it is smaller than the sum of its proper divisors (67106980).

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

51947900 is a wasteful number, since it uses less digits than its factorization.

51947900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1491 (or 1465 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 51947900 is about 7207.4891605885. The cubic root of 51947900 is about 373.1264177244.

The spelling of 51947900 in words is "fifty-one million, nine hundred forty-seven thousand, nine hundred".