51145755 has 16 divisors (see below), whose sum is σ = 83176224. Its totient is φ = 26830080.

The previous prime is 51145751. The next prime is 51145769. The reversal of 51145755 is 55754115.

It is a happy number.

It is not a de Polignac number, because 51145755 - 2² = 51145751 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51145751) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27034 + ... + 28863.

It is an arithmetic number, because the mean of its divisors is an integer number (5198514).

Almost surely, 2^51145755 is an apocalyptic number.

51145755 is a deficient number, since it is larger than the sum of its proper divisors (32030469).

51145755 is a wasteful number, since it uses less digits than its factorization.

51145755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55966.

The product of its digits is 17500, while the sum is 33.

The square root of 51145755 is about 7151.6260388809. The cubic root of 51145755 is about 371.1959233777.

The spelling of 51145755 in words is "fifty-one million, one hundred forty-five thousand, seven hundred fifty-five".