51234340 has 48 divisors (see below), whose sum is σ = 113283072. Its totient is φ = 19426176.

The previous prime is 51234299. The next prime is 51234343. The reversal of 51234340 is 4343215.

It is not an unprimeable number, because it can be changed into a prime (51234343) 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 15 ways as a sum of consecutive naturals, for example, 57982 + ... + 58858.

It is an arithmetic number, because the mean of its divisors is an integer number (2360064).

Almost surely, 2^51234340 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 51234340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56641536).

51234340 is an abundant number, since it is smaller than the sum of its proper divisors (62048732).

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

51234340 is a wasteful number, since it uses less digits than its factorization.

51234340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1036 (or 1034 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 51234340 is about 7157.8167062310. The cubic root of 51234340 is about 371.4101048864.

Adding to 51234340 its reverse (4343215), we get a palindrome (55577555).

The spelling of 51234340 in words is "fifty-one million, two hundred thirty-four thousand, three hundred forty".