51002740 has 24 divisors (see below), whose sum is σ = 107251200. Its totient is φ = 20373408.

The previous prime is 51002711. The next prime is 51002741. The reversal of 51002740 is 4720015.

51002740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51002741) 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, 20061 + ... + 22459.

It is an arithmetic number, because the mean of its divisors is an integer number (4468800).

Almost surely, 2^51002740 is an apocalyptic number.

It is an amenable number.

51002740 is an abundant number, since it is smaller than the sum of its proper divisors (56248460).

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

51002740 is a wasteful number, since it uses less digits than its factorization.

51002740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3471 (or 3469 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 51002740 is about 7141.6202643378. The cubic root of 51002740 is about 370.8496180479.

Adding to 51002740 its reverse (4720015), we get a palindrome (55722755).

The spelling of 51002740 in words is "fifty-one million, two thousand, seven hundred forty".