51123612222 has 24 divisors (see below), whose sum is σ = 110863115064. Its totient is φ = 17026544304.

The previous prime is 51123612217. The next prime is 51123612269. The reversal of 51123612222 is 22221632115.

51123612222 is a `hidden beast` number, since 5 + 1 + 1 + 23 + 612 + 2 + 22 = 666.

It is a super-2 number, since 2×51123612222² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1200133 + ... + 1242000.

It is an arithmetic number, because the mean of its divisors is an integer number (4619296461).

Almost surely, 2^51123612222 is an apocalyptic number.

51123612222 is an abundant number, since it is smaller than the sum of its proper divisors (59739502842).

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

51123612222 is a wasteful number, since it uses less digits than its factorization.

51123612222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2443304 (or 2443301 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The spelling of 51123612222 in words is "fifty-one billion, one hundred twenty-three million, six hundred twelve thousand, two hundred twenty-two".