51280687 has 8 divisors (see below), whose sum is σ = 55188432. Its totient is φ = 47472000.

The previous prime is 51280681. The next prime is 51280693. The reversal of 51280687 is 78608215.

It is an interprime number because it is at equal distance from previous prime (51280681) and next prime (51280693).

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

It is a cyclic number.

It is not a de Polignac number, because 51280687 - 2¹⁵ = 51247919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51280681) 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, 23689 + ... + 25762.

It is an arithmetic number, because the mean of its divisors is an integer number (6898554).

Almost surely, 2^51280687 is an apocalyptic number.

51280687 is a deficient number, since it is larger than the sum of its proper divisors (3907745).

51280687 is a wasteful number, since it uses less digits than its factorization.

51280687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49529.

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 51280687 is about 7161.0534839505. The cubic root of 51280687 is about 371.5220646655.

The spelling of 51280687 in words is "fifty-one million, two hundred eighty thousand, six hundred eighty-seven".