51110320 has 80 divisors (see below), whose sum is σ = 126206208. Its totient is φ = 19215360.

The previous prime is 51110317. The next prime is 51110341. The reversal of 51110320 is 2301115.

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

It is a super-2 number, since 2×51110320² = 5224529621004800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51110320.

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, 91482 + ... + 92038.

Almost surely, 2^51110320 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 51110320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63103104).

51110320 is an abundant number, since it is smaller than the sum of its proper divisors (75095888).

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

51110320 is a wasteful number, since it uses less digits than its factorization.

51110320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638 (or 632 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 51110320 is about 7149.1482010097. The cubic root of 51110320 is about 371.1101791072.

Adding to 51110320 its reverse (2301115), we get a palindrome (53411435).

The spelling of 51110320 in words is "fifty-one million, one hundred ten thousand, three hundred twenty".