51254217 has 12 divisors (see below), whose sum is σ = 84610240. Its totient is φ = 29288088.

The previous prime is 51254207. The next prime is 51254239. The reversal of 51254217 is 71245215.

It is not a de Polignac number, because 51254217 - 2¹⁰ = 51253193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51254207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 406717 + ... + 406842.

Almost surely, 2^51254217 is an apocalyptic number.

It is an amenable number.

51254217 is a deficient number, since it is larger than the sum of its proper divisors (33356023).

51254217 is a wasteful number, since it uses less digits than its factorization.

51254217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813572 (or 813569 counting only the distinct ones).

The product of its digits is 2800, while the sum is 27.

The square root of 51254217 is about 7159.2050536355. The cubic root of 51254217 is about 371.4581297342.

The spelling of 51254217 in words is "fifty-one million, two hundred fifty-four thousand, two hundred seventeen".