51205123141 has 8 divisors (see below), whose sum is σ = 51435048600. Its totient is φ = 50975284992.

The previous prime is 51205123111. The next prime is 51205123153. The reversal of 51205123141 is 14132150215.

It can be written as a sum of positive squares in 4 ways, for example, as 9719988100 + 41485135041 = 98590^2 + 203679^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51205123141 - 2³¹ = 49057639493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51205123111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1344031 + ... + 1381603.

It is an arithmetic number, because the mean of its divisors is an integer number (6429381075).

Almost surely, 2^51205123141 is an apocalyptic number.

It is an amenable number.

51205123141 is a deficient number, since it is larger than the sum of its proper divisors (229925459).

51205123141 is a wasteful number, since it uses less digits than its factorization.

51205123141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43655.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 51205123141 its reverse (14132150215), we get a palindrome (65337273356).

The spelling of 51205123141 in words is "fifty-one billion, two hundred five million, one hundred twenty-three thousand, one hundred forty-one".