51543550 has 24 divisors (see below), whose sum is σ = 97092000. Its totient is φ = 20354880.

The previous prime is 51543539. The next prime is 51543559. The reversal of 51543550 is 5534515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51543559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2575 + ... + 10474.

It is an arithmetic number, because the mean of its divisors is an integer number (4045500).

Almost surely, 2^51543550 is an apocalyptic number.

51543550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51543550 is a deficient number, since it is larger than the sum of its proper divisors (45548450).

51543550 is a wasteful number, since it uses less digits than its factorization.

51543550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13140 (or 13135 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 51543550 is about 7179.3836782833. The cubic root of 51543550 is about 372.1557861016.

The spelling of 51543550 in words is "fifty-one million, five hundred forty-three thousand, five hundred fifty".