51707217 has 16 divisors (see below), whose sum is σ = 73146240. Its totient is φ = 32378112.

The previous prime is 51707207. The next prime is 51707221. The reversal of 51707217 is 71270715.

It is not a de Polignac number, because 51707217 - 2⁶ = 51707153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51707207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41668 + ... + 42890.

It is an arithmetic number, because the mean of its divisors is an integer number (4571640).

Almost surely, 2^51707217 is an apocalyptic number.

It is an amenable number.

51707217 is a deficient number, since it is larger than the sum of its proper divisors (21439023).

51707217 is a wasteful number, since it uses less digits than its factorization.

51707217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2072.

The product of its (nonzero) digits is 3430, while the sum is 30.

The square root of 51707217 is about 7190.7730460640. The cubic root of 51707217 is about 372.5492738446.

The spelling of 51707217 in words is "fifty-one million, seven hundred seven thousand, two hundred seventeen".