51745145 has 8 divisors (see below), whose sum is σ = 62135880. Its totient is φ = 41368320.

The previous prime is 51745139. The next prime is 51745153. The reversal of 51745145 is 54154715.

51745145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 822649 + 50922496 = 907^2 + 7136^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51745145 - 2⁶ = 51745081 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 8411 + ... + 13199.

It is an arithmetic number, because the mean of its divisors is an integer number (7766985).

Almost surely, 2^51745145 is an apocalyptic number.

It is an amenable number.

51745145 is a deficient number, since it is larger than the sum of its proper divisors (10390735).

51745145 is a wasteful number, since it uses less digits than its factorization.

51745145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6955.

The product of its digits is 14000, while the sum is 32.

The square root of 51745145 is about 7193.4098312275. The cubic root of 51745145 is about 372.6403416956.

The spelling of 51745145 in words is "fifty-one million, seven hundred forty-five thousand, one hundred forty-five".