51343442040 has 128 divisors (see below), whose sum is σ = 168093273600. Its totient is φ = 12442437120.

The previous prime is 51343442039. The next prime is 51343442047. The reversal of 51343442040 is 4024434315.

51343442040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51343442040² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 51343441989 and 51343442007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51343442047) 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, 5094126 + ... + 5104194.

It is an arithmetic number, because the mean of its divisors is an integer number (1313228700).

Almost surely, 2^51343442040 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 51343442040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84046636800).

51343442040 is an abundant number, since it is smaller than the sum of its proper divisors (116749831560).

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

51343442040 is a wasteful number, since it uses less digits than its factorization.

51343442040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13957 (or 13953 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 51343442040 its reverse (4024434315), we get a palindrome (55367876355).

The spelling of 51343442040 in words is "fifty-one billion, three hundred forty-three million, four hundred forty-two thousand, forty".