51040422 has 32 divisors (see below), whose sum is σ = 119395200. Its totient is φ = 16117704.

The previous prime is 51040421. The next prime is 51040433. The reversal of 51040422 is 22404015.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 51040395 and 51040404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51040421) 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, 23848 + ... + 25899.

It is an arithmetic number, because the mean of its divisors is an integer number (3731100).

Almost surely, 2^51040422 is an apocalyptic number.

51040422 is an abundant number, since it is smaller than the sum of its proper divisors (68354778).

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

51040422 is a wasteful number, since it uses less digits than its factorization.

51040422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49777 (or 49771 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 51040422 is about 7144.2579740656. The cubic root of 51040422 is about 370.9409263135.

Adding to 51040422 its reverse (22404015), we get a palindrome (73444437).

The spelling of 51040422 in words is "fifty-one million, forty thousand, four hundred twenty-two".