51335320 has 16 divisors (see below), whose sum is σ = 115504560. Its totient is φ = 20534112.

The previous prime is 51335311. The next prime is 51335329. The reversal of 51335320 is 2353315.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51335311) and next prime (51335329).

It is a junction number, because it is equal to n+sod(n) for n = 51335291 and 51335300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51335329) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 641652 + ... + 641731.

It is an arithmetic number, because the mean of its divisors is an integer number (7219035).

Almost surely, 2^51335320 is an apocalyptic number.

It is an amenable number.

51335320 is an abundant number, since it is smaller than the sum of its proper divisors (64169240).

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

51335320 is a wasteful number, since it uses less digits than its factorization.

51335320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283394 (or 1283390 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 22.

The square root of 51335320 is about 7164.8670608742. The cubic root of 51335320 is about 371.6539542217.

Adding to 51335320 its reverse (2353315), we get a palindrome (53688635).

The spelling of 51335320 in words is "fifty-one million, three hundred thirty-five thousand, three hundred twenty".