51201100243 has 8 divisors (see below), whose sum is σ = 52453963296. Its totient is φ = 49948430400.

The previous prime is 51201100207. The next prime is 51201100261. The reversal of 51201100243 is 34200110215.

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

It is a de Polignac number, because none of the positive numbers 2^k-51201100243 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51201100243.

It is not an unprimeable number, because it can be changed into a prime (51201100043) 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, 590113 + ... + 671293.

It is an arithmetic number, because the mean of its divisors is an integer number (6556745412).

Almost surely, 2^51201100243 is an apocalyptic number.

51201100243 is a deficient number, since it is larger than the sum of its proper divisors (1252863053).

51201100243 is a wasteful number, since it uses less digits than its factorization.

51201100243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96605.

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 51201100243 its reverse (34200110215), we get a palindrome (85401210458).

The spelling of 51201100243 in words is "fifty-one billion, two hundred one million, one hundred thousand, two hundred forty-three".