51486387 has 8 divisors (see below), whose sum is σ = 72686736. Its totient is φ = 32305152.

The previous prime is 51486377. The next prime is 51486401. The reversal of 51486387 is 78368415.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51486387 - 2¹¹ = 51484339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51486317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 504718 + ... + 504819.

It is an arithmetic number, because the mean of its divisors is an integer number (9085842).

Almost surely, 2^51486387 is an apocalyptic number.

51486387 is a deficient number, since it is larger than the sum of its proper divisors (21200349).

51486387 is a wasteful number, since it uses less digits than its factorization.

51486387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009557.

The product of its digits is 161280, while the sum is 42.

The square root of 51486387 is about 7175.4015218662. The cubic root of 51486387 is about 372.0181587274.

The spelling of 51486387 in words is "fifty-one million, four hundred eighty-six thousand, three hundred eighty-seven".