51803520 has 64 divisors (see below), whose sum is σ = 165129840. Its totient is φ = 13813760.

The previous prime is 51803503. The next prime is 51803527. The reversal of 51803520 is 2530815.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51803527) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 11571 + ... + 15410.

Almost surely, 2^51803520 is an apocalyptic number.

It is an amenable number.

51803520 is an abundant number, since it is smaller than the sum of its proper divisors (113326320).

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

51803520 is a wasteful number, since it uses less digits than its factorization.

51803520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27003 (or 26991 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 51803520 is about 7197.4662208308. The cubic root of 51803520 is about 372.7804173496.

The spelling of 51803520 in words is "fifty-one million, eight hundred three thousand, five hundred twenty".