51477897 has 16 divisors (see below), whose sum is σ = 72416000. Its totient is φ = 32437584.

The previous prime is 51477847. The next prime is 51477931. The reversal of 51477897 is 79877415.

51477897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51477897 - 2¹¹ = 51475849 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51477817) 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 15 ways as a sum of consecutive naturals, for example, 34554 + ... + 36012.

It is an arithmetic number, because the mean of its divisors is an integer number (4526000).

Almost surely, 2^51477897 is an apocalyptic number.

51477897 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

It is an amenable number.

51477897 is a deficient number, since it is larger than the sum of its proper divisors (20938103).

51477897 is a wasteful number, since it uses less digits than its factorization.

51477897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2100.

The product of its digits is 493920, while the sum is 48.

The square root of 51477897 is about 7174.8098929519. The cubic root of 51477897 is about 371.9977092586.

The spelling of 51477897 in words is "fifty-one million, four hundred seventy-seven thousand, eight hundred ninety-seven".