51140255142 has 32 divisors (see below), whose sum is σ = 107064260352. Its totient is φ = 16254137504.

The previous prime is 51140255129. The next prime is 51140255149. The reversal of 51140255142 is 24155204115.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51140255149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 540768 + ... + 628259.

It is an arithmetic number, because the mean of its divisors is an integer number (3345758136).

Almost surely, 2^51140255142 is an apocalyptic number.

51140255142 is an abundant number, since it is smaller than the sum of its proper divisors (55924005210).

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

51140255142 is a wasteful number, since it uses less digits than its factorization.

51140255142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1169372.

The product of its (nonzero) digits is 8000, while the sum is 30.

Adding to 51140255142 its reverse (24155204115), we get a palindrome (75295459257).

The spelling of 51140255142 in words is "fifty-one billion, one hundred forty million, two hundred fifty-five thousand, one hundred forty-two".