51205164650051 has 2 divisors, whose sum is σ = 51205164650052. Its totient is φ = 51205164650050.

The previous prime is 51205164650047. The next prime is 51205164650131. The reversal of 51205164650051 is 15005646150215.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51205164650051 - 2² = 51205164650047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51205164649990 and 51205164650008.

It is not a weakly prime, because it can be changed into another prime (51205164650021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25602582325025 + 25602582325026.

It is an arithmetic number, because the mean of its divisors is an integer number (25602582325026).

Almost surely, 2^{51205164650051} is an apocalyptic number.

51205164650051 is a deficient number, since it is larger than the sum of its proper divisors (1).

51205164650051 is an equidigital number, since it uses as much as digits as its factorization.

51205164650051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180000, while the sum is 41.

The spelling of 51205164650051 in words is "fifty-one trillion, two hundred five billion, one hundred sixty-four million, six hundred fifty thousand, fifty-one".