51243150321 has 12 divisors (see below), whose sum is σ = 80746782480. Its totient is φ = 31056454680.

The previous prime is 51243150247. The next prime is 51243150331. The reversal of 51243150321 is 12305134215.

51243150321 is a `hidden beast` number, since 5 + 1 + 24 + 315 + 0 + 321 = 666.

It is not a de Polignac number, because 51243150321 - 2¹⁴ = 51243133937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51243150331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 258803691 + ... + 258803888.

It is an arithmetic number, because the mean of its divisors is an integer number (6728898540).

Almost surely, 2^51243150321 is an apocalyptic number.

It is an amenable number.

51243150321 is a deficient number, since it is larger than the sum of its proper divisors (29503632159).

51243150321 is a wasteful number, since it uses less digits than its factorization.

51243150321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517607596 (or 517607593 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 51243150321 its reverse (12305134215), we get a palindrome (63548284536).

The spelling of 51243150321 in words is "fifty-one billion, two hundred forty-three million, one hundred fifty thousand, three hundred twenty-one".