51513445140 has 48 divisors (see below), whose sum is σ = 144253896192. Its totient is φ = 13735371136.

The previous prime is 51513445129. The next prime is 51513445153. The reversal of 51513445140 is 4154431515.

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, 549802 + ... + 636638.

It is an arithmetic number, because the mean of its divisors is an integer number (3005289504).

Almost surely, 2^51513445140 is an apocalyptic number.

It is an amenable number.

51513445140 is an abundant number, since it is smaller than the sum of its proper divisors (92740451052).

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

51513445140 is a wasteful number, since it uses less digits than its factorization.

51513445140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96736 (or 96734 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 33.

Adding to 51513445140 its reverse (4154431515), we get a palindrome (55667876655).

The spelling of 51513445140 in words is "fifty-one billion, five hundred thirteen million, four hundred forty-five thousand, one hundred forty".