51003040 has 48 divisors (see below), whose sum is σ = 131453280. Its totient is φ = 18545920.

The previous prime is 51003019. The next prime is 51003079. The reversal of 51003040 is 4030015.

It is a self number, because there is not a number n which added to its sum of digits gives 51003040.

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, 12730 + ... + 16249.

It is an arithmetic number, because the mean of its divisors is an integer number (2738610).

Almost surely, 2^51003040 is an apocalyptic number.

It is an amenable number.

51003040 is an abundant number, since it is smaller than the sum of its proper divisors (80450240).

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

51003040 is a wasteful number, since it uses less digits than its factorization.

51003040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29005 (or 28997 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 51003040 is about 7141.6412679439. The cubic root of 51003040 is about 370.8503451636.

Adding to 51003040 its reverse (4030015), we get a palindrome (55033055).

The spelling of 51003040 in words is "fifty-one million, three thousand, forty".