51145745 has 16 divisors (see below), whose sum is σ = 70654080. Its totient is φ = 34815744.

The previous prime is 51145711. The next prime is 51145751. The reversal of 51145745 is 54754115.

It is a cyclic number.

It is not a de Polignac number, because 51145745 - 2⁶ = 51145681 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 392 + ... + 10121.

It is an arithmetic number, because the mean of its divisors is an integer number (4415880).

Almost surely, 2^51145745 is an apocalyptic number.

It is an amenable number.

51145745 is a deficient number, since it is larger than the sum of its proper divisors (19508335).

51145745 is a wasteful number, since it uses less digits than its factorization.

51145745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10664.

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

The square root of 51145745 is about 7151.6253397392. The cubic root of 51145745 is about 371.1958991857.

The spelling of 51145745 in words is "fifty-one million, one hundred forty-five thousand, seven hundred forty-five".