51105522101 has 4 divisors (see below), whose sum is σ = 51106500000. Its totient is φ = 51104544204.

The previous prime is 51105522089. The next prime is 51105522113. The reversal of 51105522101 is 10122550115.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10122550115 = 5 ⋅2024510023.

It is an interprime number because it is at equal distance from previous prime (51105522089) and next prime (51105522113).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51105522101 is a prime.

It is a super-2 number, since 2×51105522101² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51105522121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 405851 + ... + 516648.

It is an arithmetic number, because the mean of its divisors is an integer number (12776625000).

Almost surely, 2^51105522101 is an apocalyptic number.

It is an amenable number.

51105522101 is a deficient number, since it is larger than the sum of its proper divisors (977899).

51105522101 is an equidigital number, since it uses as much as digits as its factorization.

51105522101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977898.

The product of its (nonzero) digits is 500, while the sum is 23.

The spelling of 51105522101 in words is "fifty-one billion, one hundred five million, five hundred twenty-two thousand, one hundred one".