51023666540551 has 2 divisors, whose sum is σ = 51023666540552. Its totient is φ = 51023666540550.

The previous prime is 51023666540507. The next prime is 51023666540557. The reversal of 51023666540551 is 15504566632015.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51023666540551 - 2²³ = 51023658151943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51023666540495 and 51023666540504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51023666540557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25511833270275 + 25511833270276.

It is an arithmetic number, because the mean of its divisors is an integer number (25511833270276).

Almost surely, 2^{51023666540551} is an apocalyptic number.

51023666540551 is a deficient number, since it is larger than the sum of its proper divisors (1).

51023666540551 is an equidigital number, since it uses as much as digits as its factorization.

51023666540551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240000, while the sum is 49.

The spelling of 51023666540551 in words is "fifty-one trillion, twenty-three billion, six hundred sixty-six million, five hundred forty thousand, five hundred fifty-one".