51105511519 has 2 divisors, whose sum is σ = 51105511520. Its totient is φ = 51105511518.

The previous prime is 51105511489. The next prime is 51105511577. The reversal of 51105511519 is 91511550115.

51105511519 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51105511519 - 2²¹ = 51103414367 is a prime.

It is a super-2 number, since 2×51105511519² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51105511619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25552755759 + 25552755760.

It is an arithmetic number, because the mean of its divisors is an integer number (25552755760).

Almost surely, 2^51105511519 is an apocalyptic number.

51105511519 is a deficient number, since it is larger than the sum of its proper divisors (1).

51105511519 is an equidigital number, since it uses as much as digits as its factorization.

51105511519 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5625, while the sum is 34.

The spelling of 51105511519 in words is "fifty-one billion, one hundred five million, five hundred eleven thousand, five hundred nineteen".