51011355120 has 160 divisors (see below), whose sum is σ = 174590325504. Its totient is φ = 12217344000.

The previous prime is 51011354971. The next prime is 51011355127. The reversal of 51011355120 is 2155311015.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51011355127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 102720 + ... + 335520.

Almost surely, 2^51011355120 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51011355120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87295162752).

51011355120 is an abundant number, since it is smaller than the sum of its proper divisors (123578970384).

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

51011355120 is a wasteful number, since it uses less digits than its factorization.

51011355120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232911 (or 232905 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 24.

Adding to 51011355120 its reverse (2155311015), we get a palindrome (53166666135).

The spelling of 51011355120 in words is "fifty-one billion, eleven million, three hundred fifty-five thousand, one hundred twenty".