51749816 has 16 divisors (see below), whose sum is σ = 101250000. Its totient is φ = 24749824.

The previous prime is 51749813. The next prime is 51749827. The reversal of 51749816 is 61894715.

51749816 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 (51749813) 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 3 ways as a sum of consecutive naturals, for example, 140441 + ... + 140808.

It is an arithmetic number, because the mean of its divisors is an integer number (6328125).

Almost surely, 2^51749816 is an apocalyptic number.

It is an amenable number.

51749816 is a deficient number, since it is larger than the sum of its proper divisors (49500184).

51749816 is a wasteful number, since it uses less digits than its factorization.

51749816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281278 (or 281274 counting only the distinct ones).

The product of its digits is 60480, while the sum is 41.

The square root of 51749816 is about 7193.7344960736. The cubic root of 51749816 is about 372.6515540239.

The spelling of 51749816 in words is "fifty-one million, seven hundred forty-nine thousand, eight hundred sixteen".