51329550 has 24 divisors (see below), whose sum is σ = 127297656. Its totient is φ = 13687840.

The previous prime is 51329543. The next prime is 51329557. The reversal of 51329550 is 5592315.

51329550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51329543) and next prime (51329557).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51329557) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 170949 + ... + 171248.

It is an arithmetic number, because the mean of its divisors is an integer number (5304069).

Almost surely, 2^51329550 is an apocalyptic number.

51329550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51329550 is an abundant number, since it is smaller than the sum of its proper divisors (75968106).

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

51329550 is a wasteful number, since it uses less digits than its factorization.

51329550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342212 (or 342207 counting only the distinct ones).

The product of its (nonzero) digits is 6750, while the sum is 30.

The square root of 51329550 is about 7164.4643903086. The cubic root of 51329550 is about 371.6400292822.

The spelling of 51329550 in words is "fifty-one million, three hundred twenty-nine thousand, five hundred fifty".