51431004144 has 120 divisors (see below), whose sum is σ = 155109728592. Its totient is φ = 15814471680.

The previous prime is 51431004137. The next prime is 51431004161. The reversal of 51431004144 is 44140013415.

51431004144 is a `hidden beast` number, since 5 + 143 + 100 + 414 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3112384 + ... + 3128864.

Almost surely, 2^51431004144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51431004144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77554864296).

51431004144 is an abundant number, since it is smaller than the sum of its proper divisors (103678724448).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51431004144 is a wasteful number, since it uses less digits than its factorization.

51431004144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18175 (or 18166 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 51431004144 its reverse (44140013415), we get a palindrome (95571017559).

The spelling of 51431004144 in words is "fifty-one billion, four hundred thirty-one million, four thousand, one hundred forty-four".