51707431 has 2 divisors, whose sum is σ = 51707432. Its totient is φ = 51707430.

The previous prime is 51707419. The next prime is 51707459. The reversal of 51707431 is 13470715.

It is an a-pointer prime, because the next prime (51707459) can be obtained adding 51707431 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51707431 - 2⁵ = 51707399 is a prime.

It is a super-2 number, since 2×51707431² = 5347316841239522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51707431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51707231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25853715 + 25853716.

It is an arithmetic number, because the mean of its divisors is an integer number (25853716).

Almost surely, 2^51707431 is an apocalyptic number.

51707431 is a deficient number, since it is larger than the sum of its proper divisors (1).

51707431 is an equidigital number, since it uses as much as digits as its factorization.

51707431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 51707431 is about 7190.7879262289. The cubic root of 51707431 is about 372.5497877988.

The spelling of 51707431 in words is "fifty-one million, seven hundred seven thousand, four hundred thirty-one".