51055308240 has 80 divisors (see below), whose sum is σ = 158293225728. Its totient is φ = 13612876288.

The previous prime is 51055308221. The next prime is 51055308251. The reversal of 51055308240 is 4280355015.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3228994 + ... + 3244766.

Almost surely, 2^51055308240 is an apocalyptic number.

It is an amenable number.

51055308240 is an abundant number, since it is smaller than the sum of its proper divisors (107237917488).

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

51055308240 is a wasteful number, since it uses less digits than its factorization.

51055308240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29276 (or 29270 counting only the distinct ones).

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

The spelling of 51055308240 in words is "fifty-one billion, fifty-five million, three hundred eight thousand, two hundred forty".