51020200105 has 64 divisors (see below), whose sum is σ = 74097192960. Its totient is φ = 32985179136.

The previous prime is 51020200051. The next prime is 51020200109. The reversal of 51020200105 is 50100202015.

It is not a de Polignac number, because 51020200105 - 2²¹ = 51018102953 is a prime.

It is a super-2 number, since 2×51020200105² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51020200109) 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 63 ways as a sum of consecutive naturals, for example, 11994159 + ... + 11998411.

It is an arithmetic number, because the mean of its divisors is an integer number (1157768640).

Almost surely, 2^51020200105 is an apocalyptic number.

It is an amenable number.

51020200105 is a deficient number, since it is larger than the sum of its proper divisors (23076992855).

51020200105 is a wasteful number, since it uses less digits than its factorization.

51020200105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4570.

The product of its (nonzero) digits is 100, while the sum is 16.

The spelling of 51020200105 in words is "fifty-one billion, twenty million, two hundred thousand, one hundred five".