51551450 has 48 divisors (see below), whose sum is σ = 100469760. Its totient is φ = 19656000.

The previous prime is 51551449. The next prime is 51551501. The reversal of 51551450 is 5415515.

51551450 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 122240 + ... + 122660.

It is an arithmetic number, because the mean of its divisors is an integer number (2093120).

Almost surely, 2^51551450 is an apocalyptic number.

51551450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51551450 is a deficient number, since it is larger than the sum of its proper divisors (48918310).

51551450 is a wasteful number, since it uses less digits than its factorization.

51551450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543 (or 538 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 51551450 is about 7179.9338437064. The cubic root of 51551450 is about 372.1747983771.

Adding to 51551450 its reverse (5415515), we get a palindrome (56966965).

The spelling of 51551450 in words is "fifty-one million, five hundred fifty-one thousand, four hundred fifty".