51111422052 has 12 divisors (see below), whose sum is σ = 119259984816. Its totient is φ = 17037140680.

The previous prime is 51111422039. The next prime is 51111422209. The reversal of 51111422052 is 25022411115.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×51111422052² (a number of 22 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 2129642574 + ... + 2129642597.

It is an arithmetic number, because the mean of its divisors is an integer number (9938332068).

Almost surely, 2^51111422052 is an apocalyptic number.

It is an amenable number.

51111422052 is an abundant number, since it is smaller than the sum of its proper divisors (68148562764).

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

51111422052 is a wasteful number, since it uses less digits than its factorization.

51111422052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4259285178 (or 4259285176 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

Adding to 51111422052 its reverse (25022411115), we get a palindrome (76133833167).

The spelling of 51111422052 in words is "fifty-one billion, one hundred eleven million, four hundred twenty-two thousand, fifty-two".