51350551 has 4 divisors (see below), whose sum is σ = 58686352. Its totient is φ = 44014752.

The previous prime is 51350527. The next prime is 51350567. The reversal of 51350551 is 15505315.

51350551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51350551 - 2⁷ = 51350423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51350581) 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 3 ways as a sum of consecutive naturals, for example, 3667890 + ... + 3667903.

It is an arithmetic number, because the mean of its divisors is an integer number (14671588).

Almost surely, 2^51350551 is an apocalyptic number.

51350551 is a deficient number, since it is larger than the sum of its proper divisors (7335801).

51350551 is an equidigital number, since it uses as much as digits as its factorization.

51350551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7335800.

The product of its (nonzero) digits is 1875, while the sum is 25.

The square root of 51350551 is about 7165.9298768548. The cubic root of 51350551 is about 371.6907067060.

Adding to 51350551 its reverse (15505315), we get a palindrome (66855866).

The spelling of 51350551 in words is "fifty-one million, three hundred fifty thousand, five hundred fifty-one".