51287417 has 8 divisors (see below), whose sum is σ = 51865440. Its totient is φ = 50712480.

The previous prime is 51287377. The next prime is 51287429. The reversal of 51287417 is 71478215.

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 51287417 - 2⁸ = 51287161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51287437) 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, 49133 + ... + 50165.

It is an arithmetic number, because the mean of its divisors is an integer number (6483180).

Almost surely, 2^51287417 is an apocalyptic number.

It is an amenable number.

51287417 is a deficient number, since it is larger than the sum of its proper divisors (578023).

51287417 is a wasteful number, since it uses less digits than its factorization.

51287417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1543.

The product of its digits is 15680, while the sum is 35.

The square root of 51287417 is about 7161.5233714622. The cubic root of 51287417 is about 371.5383166197.

The spelling of 51287417 in words is "fifty-one million, two hundred eighty-seven thousand, four hundred seventeen".