51024111820 has 96 divisors (see below), whose sum is σ = 118183403520. Its totient is φ = 18350115840.

The previous prime is 51024111791. The next prime is 51024111841. The reversal of 51024111820 is 2811142015.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9413071 + ... + 9418489.

It is an arithmetic number, because the mean of its divisors is an integer number (1231077120).

Almost surely, 2^51024111820 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 51024111820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59091701760).

51024111820 is an abundant number, since it is smaller than the sum of its proper divisors (67159291700).

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

51024111820 is a wasteful number, since it uses less digits than its factorization.

51024111820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5903 (or 5901 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 25.

Adding to 51024111820 its reverse (2811142015), we get a palindrome (53835253835).

The spelling of 51024111820 in words is "fifty-one billion, twenty-four million, one hundred eleven thousand, eight hundred twenty".