51142065 has 32 divisors (see below), whose sum is σ = 88717440. Its totient is φ = 25007616.

The previous prime is 51142061. The next prime is 51142073. The reversal of 51142065 is 56024115.

51142065 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 51142065 - 2² = 51142061 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51142061) 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 31 ways as a sum of consecutive naturals, for example, 30981 + ... + 32589.

It is an arithmetic number, because the mean of its divisors is an integer number (2772420).

Almost surely, 2^51142065 is an apocalyptic number.

It is an amenable number.

51142065 is a deficient number, since it is larger than the sum of its proper divisors (37575375).

51142065 is a wasteful number, since it uses less digits than its factorization.

51142065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1793.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 51142065 is about 7151.3680509396. The cubic root of 51142065 is about 371.1869963032.

The spelling of 51142065 in words is "fifty-one million, one hundred forty-two thousand, sixty-five".