51111005106 has 32 divisors (see below), whose sum is σ = 116836807680. Its totient is φ = 14601687696.

The previous prime is 51111005083. The next prime is 51111005117. The reversal of 51111005106 is 60150011115.

It is a happy number.

It is a super-2 number, since 2×51111005106² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 407955 + ... + 518313.

It is an arithmetic number, because the mean of its divisors is an integer number (3651150240).

Almost surely, 2^51111005106 is an apocalyptic number.

51111005106 is an abundant number, since it is smaller than the sum of its proper divisors (65725802574).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51111005106 is a wasteful number, since it uses less digits than its factorization.

51111005106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121398.

The product of its (nonzero) digits is 150, while the sum is 21.

The spelling of 51111005106 in words is "fifty-one billion, one hundred eleven million, five thousand, one hundred six".