51903280 has 120 divisors (see below), whose sum is σ = 142959600. Its totient is φ = 17372160.

The previous prime is 51903263. The next prime is 51903289. The reversal of 51903280 is 8230915.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51903289) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 148546 + ... + 148894.

It is an arithmetic number, because the mean of its divisors is an integer number (1191330).

Almost surely, 2^51903280 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 51903280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71479800).

51903280 is an abundant number, since it is smaller than the sum of its proper divisors (91056320).

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

51903280 is a wasteful number, since it uses less digits than its factorization.

51903280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399 (or 380 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 51903280 is about 7204.3931042108. The cubic root of 51903280 is about 373.0195563638.

The spelling of 51903280 in words is "fifty-one million, nine hundred three thousand, two hundred eighty".