51710261 has 4 divisors (see below), whose sum is σ = 51936300. Its totient is φ = 51484224.

The previous prime is 51710257. The next prime is 51710273. The reversal of 51710261 is 16201715.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48580900 + 3129361 = 6970^2 + 1769^2 .

It is a cyclic number.

It is not a de Polignac number, because 51710261 - 2² = 51710257 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 (51710221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112676 + ... + 113133.

It is an arithmetic number, because the mean of its divisors is an integer number (12984075).

Almost surely, 2^51710261 is an apocalyptic number.

It is an amenable number.

51710261 is a deficient number, since it is larger than the sum of its proper divisors (226039).

51710261 is a wasteful number, since it uses less digits than its factorization.

51710261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226038.

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 51710261 is about 7190.9847030848. The cubic root of 51710261 is about 372.5565843504.

Adding to 51710261 its reverse (16201715), we get a palindrome (67911976).

The spelling of 51710261 in words is "fifty-one million, seven hundred ten thousand, two hundred sixty-one".