51033540000 has 240 divisors, whose sum is σ = 170971371648. Its totient is φ = 13318656000.

The previous prime is 51033539971. The next prime is 51033540001. The reversal of 51033540000 is 4533015.

It is a tau number, because it is divible by the number of its divisors (240).

It is not an unprimeable number, because it can be changed into a prime (51033540001) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2810952 + ... + 2829048.

Almost surely, 2^51033540000 is an apocalyptic number.

51033540000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51033540000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85485685824).

51033540000 is an abundant number, since it is smaller than the sum of its proper divisors (119937831648).

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

51033540000 is a wasteful number, since it uses less digits than its factorization.

51033540000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18177 (or 18154 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 21.

The spelling of 51033540000 in words is "fifty-one billion, thirty-three million, five hundred forty thousand".