51323550 has 48 divisors (see below), whose sum is σ = 127729920. Its totient is φ = 13638240.

The previous prime is 51323543. The next prime is 51323563. The reversal of 51323550 is 5532315.

51323550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 51323550.

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 23 ways as a sum of consecutive naturals, for example, 69081 + ... + 69819.

It is an arithmetic number, because the mean of its divisors is an integer number (2661040).

Almost surely, 2^51323550 is an apocalyptic number.

51323550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51323550 is an abundant number, since it is smaller than the sum of its proper divisors (76406370).

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

51323550 is a wasteful number, since it uses less digits than its factorization.

51323550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217 (or 1212 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 24.

The square root of 51323550 is about 7164.0456447457. The cubic root of 51323550 is about 371.6255481691.

Adding to 51323550 its reverse (5532315), we get a palindrome (56855865).

The spelling of 51323550 in words is "fifty-one million, three hundred twenty-three thousand, five hundred fifty".