51103230644 has 24 divisors (see below), whose sum is σ = 89547272640. Its totient is φ = 25518324096.

The previous prime is 51103230617. The next prime is 51103230649. The reversal of 51103230644 is 44603230115.

It is a super-2 number, since 2×51103230644² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51103230649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17638604 + ... + 17641500.

It is an arithmetic number, because the mean of its divisors is an integer number (3731136360).

Almost surely, 2^51103230644 is an apocalyptic number.

It is an amenable number.

51103230644 is a deficient number, since it is larger than the sum of its proper divisors (38444041996).

51103230644 is a wasteful number, since it uses less digits than its factorization.

51103230644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7127 (or 7125 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 51103230644 its reverse (44603230115), we get a palindrome (95706460759).

The spelling of 51103230644 in words is "fifty-one billion, one hundred three million, two hundred thirty thousand, six hundred forty-four".