51350440 has 32 divisors (see below), whose sum is σ = 116938080. Its totient is φ = 20291392.

The previous prime is 51350423. The next prime is 51350441. The reversal of 51350440 is 4405315.

51350440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (51350441) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4414 + ... + 11053.

It is an arithmetic number, because the mean of its divisors is an integer number (3654315).

Almost surely, 2^51350440 is an apocalyptic number.

It is an amenable number.

51350440 is an abundant number, since it is smaller than the sum of its proper divisors (65587640).

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

51350440 is a wasteful number, since it uses less digits than its factorization.

51350440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15561 (or 15557 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 51350440 is about 7165.9221318683. The cubic root of 51350440 is about 371.6904388887.

Adding to 51350440 its reverse (4405315), we get a palindrome (55755755).

The spelling of 51350440 in words is "fifty-one million, three hundred fifty thousand, four hundred forty".