51087748 has 12 divisors (see below), whose sum is σ = 89461260. Its totient is φ = 25527392.

The previous prime is 51087733. The next prime is 51087791. The reversal of 51087748 is 84778015.

It can be written as a sum of positive squares in 2 ways, for example, as 3090564 + 47997184 = 1758^2 + 6928^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51087748.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5190 + ... + 11362.

It is an arithmetic number, because the mean of its divisors is an integer number (7455105).

Almost surely, 2^51087748 is an apocalyptic number.

It is an amenable number.

51087748 is a deficient number, since it is larger than the sum of its proper divisors (38373512).

51087748 is a wasteful number, since it uses less digits than its factorization.

51087748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8246 (or 8244 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 51087748 is about 7147.5693770680. The cubic root of 51087748 is about 371.0555395718.

The spelling of 51087748 in words is "fifty-one million, eighty-seven thousand, seven hundred forty-eight".