51333065240 has 16 divisors (see below), whose sum is σ = 115499396880. Its totient is φ = 20533226080.

The previous prime is 51333065239. The next prime is 51333065293. The reversal of 51333065240 is 4256033315.

51333065240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 51333065197 and 51333065206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 641663276 + ... + 641663355.

It is an arithmetic number, because the mean of its divisors is an integer number (7218712305).

Almost surely, 2^51333065240 is an apocalyptic number.

It is an amenable number.

51333065240 is an abundant number, since it is smaller than the sum of its proper divisors (64166331640).

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

51333065240 is a wasteful number, since it uses less digits than its factorization.

51333065240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1283326642 (or 1283326638 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 32.

Adding to 51333065240 its reverse (4256033315), we get a palindrome (55589098555).

The spelling of 51333065240 in words is "fifty-one billion, three hundred thirty-three million, sixty-five thousand, two hundred forty".