51489716 has 6 divisors (see below), whose sum is σ = 90107010. Its totient is φ = 25744856.

The previous prime is 51489689. The next prime is 51489721. The reversal of 51489716 is 61798415.

51489716 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 29116816 + 22372900 = 5396^2 + 4730^2 .

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 as a sum of consecutive naturals, namely, 6436211 + ... + 6436218.

It is an arithmetic number, because the mean of its divisors is an integer number (15017835).

Almost surely, 2^51489716 is an apocalyptic number.

It is an amenable number.

51489716 is a deficient number, since it is larger than the sum of its proper divisors (38617294).

51489716 is a wasteful number, since it uses less digits than its factorization.

51489716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12872433 (or 12872431 counting only the distinct ones).

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

The square root of 51489716 is about 7175.6334911978. The cubic root of 51489716 is about 372.0261765216.

The spelling of 51489716 in words is "fifty-one million, four hundred eighty-nine thousand, seven hundred sixteen".