51486668 has 12 divisors (see below), whose sum is σ = 90790392. Its totient is φ = 25546560.

The previous prime is 51486661. The next prime is 51486671. The reversal of 51486668 is 86668415.

It is not an unprimeable number, because it can be changed into a prime (51486661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48605 + ... + 49652.

It is an arithmetic number, because the mean of its divisors is an integer number (7565866).

Almost surely, 2^51486668 is an apocalyptic number.

It is an amenable number.

51486668 is a deficient number, since it is larger than the sum of its proper divisors (39303724).

51486668 is a wasteful number, since it uses less digits than its factorization.

51486668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98392 (or 98390 counting only the distinct ones).

The product of its digits is 276480, while the sum is 44.

The square root of 51486668 is about 7175.4211026253. The cubic root of 51486668 is about 372.0188355206.

The spelling of 51486668 in words is "fifty-one million, four hundred eighty-six thousand, six hundred sixty-eight".