51015021671651 has 2 divisors, whose sum is σ = 51015021671652. Its totient is φ = 51015021671650.

The previous prime is 51015021671639. The next prime is 51015021671681. The reversal of 51015021671651 is 15617612051015.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51015021671651 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51015021671599 and 51015021671608.

It is not a weakly prime, because it can be changed into another prime (51015021671681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25507510835825 + 25507510835826.

It is an arithmetic number, because the mean of its divisors is an integer number (25507510835826).

Almost surely, 2^{51015021671651} is an apocalyptic number.

51015021671651 is a deficient number, since it is larger than the sum of its proper divisors (1).

51015021671651 is an equidigital number, since it uses as much as digits as its factorization.

51015021671651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63000, while the sum is 41.

The spelling of 51015021671651 in words is "fifty-one trillion, fifteen billion, twenty-one million, six hundred seventy-one thousand, six hundred fifty-one".