51771679 has 2 divisors, whose sum is σ = 51771680. Its totient is φ = 51771678.

The previous prime is 51771667. The next prime is 51771701. The reversal of 51771679 is 97617715.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51771679 - 2¹¹ = 51769631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51771649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25885839 + 25885840.

It is an arithmetic number, because the mean of its divisors is an integer number (25885840).

Almost surely, 2^51771679 is an apocalyptic number.

51771679 is a deficient number, since it is larger than the sum of its proper divisors (1).

51771679 is an equidigital number, since it uses as much as digits as its factorization.

51771679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92610, while the sum is 43.

The square root of 51771679 is about 7195.2539218571. The cubic root of 51771679 is about 372.7040252820.

The spelling of 51771679 in words is "fifty-one million, seven hundred seventy-one thousand, six hundred seventy-nine".