51308142 has 32 divisors (see below), whose sum is σ = 108959904. Its totient is φ = 16051200.

The previous prime is 51308141. The next prime is 51308149. The reversal of 51308142 is 24180315.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51308141) 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, 67042 + ... + 67802.

It is an arithmetic number, because the mean of its divisors is an integer number (3404997).

Almost surely, 2^51308142 is an apocalyptic number.

51308142 is an abundant number, since it is smaller than the sum of its proper divisors (57651762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51308142 is a wasteful number, since it uses less digits than its factorization.

51308142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1444.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 51308142 is about 7162.9701939908. The cubic root of 51308142 is about 371.5883554992.

Adding to 51308142 its reverse (24180315), we get a palindrome (75488457).

The spelling of 51308142 in words is "fifty-one million, three hundred eight thousand, one hundred forty-two".