51433255540 has 48 divisors (see below), whose sum is σ = 114386936832. Its totient is φ = 19359115776.

The previous prime is 51433255537. The next prime is 51433255553. The reversal of 51433255540 is 4555233415.

It is a self number, because there is not a number n which added to its sum of digits gives 51433255540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2029789 + ... + 2054971.

It is an arithmetic number, because the mean of its divisors is an integer number (2383061184).

Almost surely, 2^51433255540 is an apocalyptic number.

It is an amenable number.

51433255540 is an abundant number, since it is smaller than the sum of its proper divisors (62953681292).

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

51433255540 is a wasteful number, since it uses less digits than its factorization.

51433255540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31216 (or 31214 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 37.

Adding to 51433255540 its reverse (4555233415), we get a palindrome (55988488955).

The spelling of 51433255540 in words is "fifty-one billion, four hundred thirty-three million, two hundred fifty-five thousand, five hundred forty".