51001320 has 64 divisors (see below), whose sum is σ = 161064000. Its totient is φ = 12883968.

The previous prime is 51001303. The next prime is 51001367. The reversal of 51001320 is 2310015.

51001320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51001320² = 5202269283484800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 51001296 and 51001305.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8905 + ... + 13464.

It is an arithmetic number, because the mean of its divisors is an integer number (2516625).

Almost surely, 2^51001320 is an apocalyptic number.

It is an amenable number.

51001320 is an abundant number, since it is smaller than the sum of its proper divisors (110062680).

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

51001320 is a wasteful number, since it uses less digits than its factorization.

51001320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22402 (or 22398 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 51001320 is about 7141.5208464304. The cubic root of 51001320 is about 370.8461763286.

Adding to 51001320 its reverse (2310015), we get a palindrome (53311335).

The spelling of 51001320 in words is "fifty-one million, one thousand, three hundred twenty".