51215345422111 has 16 divisors (see below), whose sum is σ = 55172817651168. Its totient is φ = 47260422576000.

The previous prime is 51215345422091. The next prime is 51215345422139. The reversal of 51215345422111 is 11122454351215.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 51215345422111 - 2¹⁵ = 51215345389343 is a prime.

It is a super-2 number, since 2×51215345422111² (a number of 28 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 (51215345428111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 677943001 + ... + 678018541.

It is an arithmetic number, because the mean of its divisors is an integer number (3448301103198).

Almost surely, 2^{51215345422111} is an apocalyptic number.

51215345422111 is a deficient number, since it is larger than the sum of its proper divisors (3957472229057).

51215345422111 is a wasteful number, since it uses less digits than its factorization.

51215345422111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91722.

The product of its digits is 48000, while the sum is 37.

Adding to 51215345422111 its reverse (11122454351215), we get a palindrome (62337799773326).

The spelling of 51215345422111 in words is "fifty-one trillion, two hundred fifteen billion, three hundred forty-five million, four hundred twenty-two thousand, one hundred eleven".