51280142 has 4 divisors (see below), whose sum is σ = 76920216. Its totient is φ = 25640070.

The previous prime is 51280121. The next prime is 51280147. The reversal of 51280142 is 24108215.

51280142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24108215 = 5 ⋅4821643.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51280147) 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 as a sum of consecutive naturals, namely, 12820034 + ... + 12820037.

It is an arithmetic number, because the mean of its divisors is an integer number (19230054).

Almost surely, 2^51280142 is an apocalyptic number.

51280142 is a deficient number, since it is larger than the sum of its proper divisors (25640074).

51280142 is a wasteful number, since it uses less digits than its factorization.

51280142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25640073.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 51280142 is about 7161.0154307891. The cubic root of 51280142 is about 371.5207485089.

Adding to 51280142 its reverse (24108215), we get a palindrome (75388357).

The spelling of 51280142 in words is "fifty-one million, two hundred eighty thousand, one hundred forty-two".