51111105515567 has 2 divisors, whose sum is σ = 51111105515568. Its totient is φ = 51111105515566.

The previous prime is 51111105515521. The next prime is 51111105515579. The reversal of 51111105515567 is 76551550111115.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51111105515567 - 2²⁰ = 51111104466991 is a prime.

It is a super-2 number, since 2×51111105515567² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51111105515867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25555552757783 + 25555552757784.

It is an arithmetic number, because the mean of its divisors is an integer number (25555552757784).

Almost surely, 2^{51111105515567} is an apocalyptic number.

51111105515567 is a deficient number, since it is larger than the sum of its proper divisors (1).

51111105515567 is an equidigital number, since it uses as much as digits as its factorization.

51111105515567 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 131250, while the sum is 44.

The spelling of 51111105515567 in words is "fifty-one trillion, one hundred eleven billion, one hundred five million, five hundred fifteen thousand, five hundred sixty-seven".