51171207 has 12 divisors (see below), whose sum is σ = 72479016. Its totient is φ = 32106880.

The previous prime is 51171193. The next prime is 51171229. The reversal of 51171207 is 70217115.

It is a happy number.

It is not a de Polignac number, because 51171207 - 2⁶ = 51171143 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51171257) 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, 28644 + ... + 30377.

It is an arithmetic number, because the mean of its divisors is an integer number (6039918).

Almost surely, 2^51171207 is an apocalyptic number.

51171207 is a deficient number, since it is larger than the sum of its proper divisors (21307809).

51171207 is a wasteful number, since it uses less digits than its factorization.

51171207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59058 (or 59041 counting only the distinct ones).

The product of its (nonzero) digits is 490, while the sum is 24.

The square root of 51171207 is about 7153.4052730151. The cubic root of 51171207 is about 371.2574867268.

The spelling of 51171207 in words is "fifty-one million, one hundred seventy-one thousand, two hundred seven".