51783550 has 96 divisors (see below), whose sum is σ = 124992000. Its totient is φ = 15500160.

The previous prime is 51783509. The next prime is 51783577. The reversal of 51783550 is 5538715.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 86151 + ... + 86749.

It is an arithmetic number, because the mean of its divisors is an integer number (1302000).

Almost surely, 2^51783550 is an apocalyptic number.

51783550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51783550 is an abundant number, since it is smaller than the sum of its proper divisors (73208450).

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

51783550 is a wasteful number, since it uses less digits than its factorization.

51783550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650 (or 645 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 34.

The square root of 51783550 is about 7196.0787933429. The cubic root of 51783550 is about 372.7325095257.

The spelling of 51783550 in words is "fifty-one million, seven hundred eighty-three thousand, five hundred fifty".