51287416 has 16 divisors (see below), whose sum is σ = 96240240. Its totient is φ = 25623360.

The previous prime is 51287377. The next prime is 51287429. The reversal of 51287416 is 61478215.

51287416 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 an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 16981 + ... + 19771.

It is an arithmetic number, because the mean of its divisors is an integer number (6015015).

Almost surely, 2^51287416 is an apocalyptic number.

It is an amenable number.

51287416 is a deficient number, since it is larger than the sum of its proper divisors (44952824).

51287416 is a wasteful number, since it uses less digits than its factorization.

51287416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5094 (or 5090 counting only the distinct ones).

The product of its digits is 13440, while the sum is 34.

The square root of 51287416 is about 7161.5233016447. The cubic root of 51287416 is about 371.5383142049.

It can be divided in two parts, 5128 and 7416, that added together give a square (12544 = 112²).

The spelling of 51287416 in words is "fifty-one million, two hundred eighty-seven thousand, four hundred sixteen".