51166004251 has 2 divisors, whose sum is σ = 51166004252. Its totient is φ = 51166004250.

The previous prime is 51166004233. The next prime is 51166004261. The reversal of 51166004251 is 15240066115.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51166004251 - 2¹⁷ = 51165873179 is a prime.

It is not a weakly prime, because it can be changed into another prime (51166004261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25583002125 + 25583002126.

It is an arithmetic number, because the mean of its divisors is an integer number (25583002126).

Almost surely, 2^51166004251 is an apocalyptic number.

51166004251 is a deficient number, since it is larger than the sum of its proper divisors (1).

51166004251 is an equidigital number, since it uses as much as digits as its factorization.

51166004251 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 31.

The spelling of 51166004251 in words is "fifty-one billion, one hundred sixty-six million, four thousand, two hundred fifty-one".