51477145 has 4 divisors (see below), whose sum is σ = 61772580. Its totient is φ = 41181712.

The previous prime is 51477133. The next prime is 51477161. The reversal of 51477145 is 54177415.

51477145 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 can be written as a sum of positive squares in 2 ways, for example, as 22543504 + 28933641 = 4748^2 + 5379^2 .

It is a cyclic number.

It is not a de Polignac number, because 51477145 - 2⁵ = 51477113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51477145.

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 3 ways as a sum of consecutive naturals, for example, 5147710 + ... + 5147719.

It is an arithmetic number, because the mean of its divisors is an integer number (15443145).

Almost surely, 2^51477145 is an apocalyptic number.

It is an amenable number.

51477145 is a deficient number, since it is larger than the sum of its proper divisors (10295435).

51477145 is a wasteful number, since it uses less digits than its factorization.

51477145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10295434.

The product of its digits is 19600, while the sum is 34.

The square root of 51477145 is about 7174.7574871908. The cubic root of 51477145 is about 371.9958978428.

The spelling of 51477145 in words is "fifty-one million, four hundred seventy-seven thousand, one hundred forty-five".