51037920 has 216 divisors, whose sum is σ = 184786056. Its totient is φ = 12824064.

The previous prime is 51037841. The next prime is 51037937. The reversal of 51037920 is 2973015.

It is a congruent number.

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 35 ways as a sum of consecutive naturals, for example, 761727 + ... + 761793.

It is an arithmetic number, because the mean of its divisors is an integer number (855491).

Almost surely, 2^51037920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51037920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92393028).

51037920 is an abundant number, since it is smaller than the sum of its proper divisors (133748136).

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

51037920 is a wasteful number, since it uses less digits than its factorization.

51037920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134 (or 100 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 51037920 is about 7144.0828662607. The cubic root of 51037920 is about 370.9348650434.

The spelling of 51037920 in words is "fifty-one million, thirty-seven thousand, nine hundred twenty".