51133280 has 96 divisors (see below), whose sum is σ = 139618080. Its totient is φ = 17489920.

The previous prime is 51133279. The next prime is 51133307. The reversal of 51133280 is 8233115.

It is a super-2 number, since 2×51133280² = 5229224647116800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29066 + ... + 30774.

It is an arithmetic number, because the mean of its divisors is an integer number (1454355).

Almost surely, 2^51133280 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 51133280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69809040).

51133280 is an abundant number, since it is smaller than the sum of its proper divisors (88484800).

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

51133280 is a wasteful number, since it uses less digits than its factorization.

51133280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1752 (or 1744 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 51133280 is about 7150.7538064179. The cubic root of 51133280 is about 371.1657413637.

Adding to 51133280 its reverse (8233115), we get a palindrome (59366395).

It can be divided in two parts, 51 and 133280, that added together give a palindrome (133331).

The spelling of 51133280 in words is "fifty-one million, one hundred thirty-three thousand, two hundred eighty".