51335140 has 12 divisors (see below), whose sum is σ = 107803836. Its totient is φ = 20534048.

The previous prime is 51335083. The next prime is 51335143. The reversal of 51335140 is 4153315.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 36650916 + 14684224 = 6054^2 + 3832^2 .

It is not an unprimeable number, because it can be changed into a prime (51335143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1283359 + ... + 1283398.

It is an arithmetic number, because the mean of its divisors is an integer number (8983653).

Almost surely, 2^51335140 is an apocalyptic number.

It is an amenable number.

51335140 is an abundant number, since it is smaller than the sum of its proper divisors (56468696).

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

51335140 is a wasteful number, since it uses less digits than its factorization.

51335140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2566766 (or 2566764 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 51335140 is about 7164.8544995694. The cubic root of 51335140 is about 371.6535198372.

Adding to 51335140 its reverse (4153315), we get a palindrome (55488455).

It can be divided in two parts, 513 and 35140, that added together give a palindrome (35653).

The spelling of 51335140 in words is "fifty-one million, three hundred thirty-five thousand, one hundred forty".