51451143520144 has 40 divisors (see below), whose sum is σ = 99911494853280. Its totient is φ = 25667575734528.

The previous prime is 51451143520141. The next prime is 51451143520151. The reversal of 51451143520144 is 44102534115415.

It is a junction number, because it is equal to n+sod(n) for n = 51451143520097 and 51451143520106.

It is not an unprimeable number, because it can be changed into a prime (51451143520141) 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, 17450619 + ... + 20184805.

It is an arithmetic number, because the mean of its divisors is an integer number (2497787371332).

Almost surely, 2^{51451143520144} is an apocalyptic number.

It is an amenable number.

51451143520144 is a deficient number, since it is larger than the sum of its proper divisors (48460351333136).

51451143520144 is a wasteful number, since it uses less digits than its factorization.

51451143520144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2736847 (or 2736841 counting only the distinct ones).

The product of its (nonzero) digits is 192000, while the sum is 40.

Adding to 51451143520144 its reverse (44102534115415), we get a palindrome (95553677635559).

The spelling of 51451143520144 in words is "fifty-one trillion, four hundred fifty-one billion, one hundred forty-three million, five hundred twenty thousand, one hundred forty-four".