51451324340 has 96 divisors (see below), whose sum is σ = 121805752320. Its totient is φ = 18125452800.

The previous prime is 51451324319. The next prime is 51451324349. The reversal of 51451324340 is 4342315415.

It is a junction number, because it is equal to n+sod(n) for n = 51451324297 and 51451324306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51451324349) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 527306 + ... + 617214.

It is an arithmetic number, because the mean of its divisors is an integer number (1268809920).

Almost surely, 2^51451324340 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 51451324340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60902876160).

51451324340 is an abundant number, since it is smaller than the sum of its proper divisors (70354427980).

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

51451324340 is a wasteful number, since it uses less digits than its factorization.

51451324340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90033 (or 90031 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 51451324340 its reverse (4342315415), we get a palindrome (55793639755).

The spelling of 51451324340 in words is "fifty-one billion, four hundred fifty-one million, three hundred twenty-four thousand, three hundred forty".