51434140 has 24 divisors (see below), whose sum is σ = 113697360. Its totient is φ = 19490688.

The previous prime is 51434093. The next prime is 51434171. The reversal of 51434140 is 4143415.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 67297 + ... + 68056.

It is an arithmetic number, because the mean of its divisors is an integer number (4737390).

Almost surely, 2^51434140 is an apocalyptic number.

It is an amenable number.

51434140 is an abundant number, since it is smaller than the sum of its proper divisors (62263220).

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

51434140 is a wasteful number, since it uses less digits than its factorization.

51434140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135381 (or 135379 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 51434140 is about 7171.7598955905. The cubic root of 51434140 is about 371.8922781323.

Adding to 51434140 its reverse (4143415), we get a palindrome (55577555).

The spelling of 51434140 in words is "fifty-one million, four hundred thirty-four thousand, one hundred forty".